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question_answer1)
Light is a form of energy produced by a
A)
luminous object done
clear
B)
non-luminous object done
clear
C)
transparent object done
clear
D)
opaque object done
clear
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question_answer2)
Planets are example of
A)
luminous object done
clear
B)
non-luminous object done
clear
C)
translucent object done
clear
D)
transparent object done
clear
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question_answer3)
Which of these conditions is/are essential for a shadows to be produced?
A)
A light source done
clear
B)
An opaque object done
clear
C)
A screen/surface done
clear
D)
All of the above done
clear
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question_answer4)
An artificial source of light is
A)
sun done
clear
B)
firefly done
clear
C)
jellyfish done
clear
D)
electric bulb done
clear
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question_answer5)
Which of these materials could produce a shadow?
A)
A clear glass slab done
clear
B)
A milky white plastic done
clear
C)
Clear water done
clear
D)
A piece of wood done
clear
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question_answer6)
A.......... image can be obtained on a screen.
A)
real done
clear
B)
virtual done
clear
C)
eract done
clear
D)
inverted done
clear
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question_answer7)
When a person sees himself in a mirror, what do his eyes observe?
A)
A virtual image whose rays originate at the person. done
clear
B)
A virtual image formed from light that originate behind the mirror. done
clear
C)
Areal image whose rays appear to originate at the person. done
clear
D)
A real image whose rays originate behind the mirror. done
clear
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question_answer8)
The objects that cast shadow are
A)
transparent done
clear
B)
translucent done
clear
C)
opaque done
clear
D)
luminous done
clear
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question_answer9)
What happen to light rays when they strike an uneven surface from same direction?
A)
They are reflected in the same direction done
clear
B)
They are reflected in many directions done
clear
C)
They are absorbed by the surface done
clear
D)
They pass through the surface and are diffracted done
clear
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question_answer10)
If a student stand 3 m in front of a mirror, what is the distance between he and his image?
A)
1.5m done
clear
B)
3m done
clear
C)
6m done
clear
D)
7.5m done
clear
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question_answer11)
Which of the following is/are the example(s) of a light reflector? 1. Fluorescent tube 2. A mirror 3. The moon
A)
(1) only done
clear
B)
(3) only done
clear
C)
(1) and (2) only done
clear
D)
(2) and (3) only done
clear
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question_answer12)
Select the one that is a natural source of light.
A)
Lighted fluorescent tube done
clear
B)
Red hot iron bar done
clear
C)
Sun done
clear
D)
Trees done
clear
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question_answer13)
Which of the following is a non-luminous body?
A)
Sun done
clear
B)
Moon done
clear
C)
Stars done
clear
D)
All of these done
clear
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question_answer14)
To see a non-luminous object we need
A)
light done
clear
B)
eyes done
clear
C)
Both of these done
clear
D)
None of these done
clear
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question_answer15)
Which of the following is a transparent substance?
A)
Wooden blackboard done
clear
B)
Mirror done
clear
C)
A sheet of glass done
clear
D)
None of these done
clear
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question_answer16)
Which of the following is translucent?
A)
Oily paper done
clear
B)
Aluminium sheet done
clear
C)
Glass done
clear
D)
None of these done
clear
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question_answer17)
"Speed of light is the same, no matter how it is measured" was first contemplated by
A)
A.A. Michelson done
clear
B)
John Dalton done
clear
C)
Albert Einstein done
clear
D)
None of these done
clear
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question_answer18)
If an object placed in the path of light allowed almost the whole of the light falling on it to pass through it, then the object is classified as
A)
transparent done
clear
B)
translucent done
clear
C)
opaque done
clear
D)
None of these done
clear
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question_answer19)
A shining star is
A)
a natural source of light done
clear
B)
an artificial source of light done
clear
C)
a luminous body done
clear
D)
Both (a) and (c) done
clear
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question_answer20)
A translucent substance
A)
allows most of light to pass through it done
clear
B)
allows a part of light to pass through it done
clear
C)
does not allow light to pass through it done
clear
D)
None of the above is correct done
clear
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question_answer21)
An image is formed on a screen when
A)
a transparent object is placed between the screen and the source of light done
clear
B)
an opaque object is placed between the screen and the source of light done
clear
C)
Both the above are correct done
clear
D)
None of the above is correct done
clear
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question_answer22)
In a pinhole camera, the image formed is
A)
erect done
clear
B)
inverted done
clear
C)
smaller done
clear
D)
larger done
clear
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question_answer23)
Moon is a
A)
luminous body done
clear
B)
non-luminous body done
clear
C)
neither luminous nor non-luminious done
clear
D)
None of the above is correct done
clear
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question_answer24)
Which of the following are needed for formation of a shadow?
A)
Source of light done
clear
B)
An opaque object done
clear
C)
Screen done
clear
D)
All of these done
clear
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question_answer25)
Does the shadow of an object always provide us correct information about the shape of the object?
A)
Yes done
clear
B)
No done
clear
C)
Can't say done
clear
D)
All are incorrect done
clear
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question_answer26)
Which of the following will form a shadow similar to that formed by a thin note-book?
A)
A rectangular box done
clear
B)
A circular box done
clear
C)
Both the above done
clear
D)
None of these done
clear
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question_answer27)
Thick black paper is
A)
transparent done
clear
B)
translucent done
clear
C)
opaque done
clear
D)
None of these done
clear
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question_answer28)
Following are some sources of light. Which of them is natural?
A)
Moon done
clear
B)
Flame of candle done
clear
C)
Bulb done
clear
D)
Sun done
clear
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question_answer29)
Which tiny particles can be observed in a ray of light entering from a small gap of a window?
A)
Oxygen done
clear
B)
Nitrogen done
clear
C)
Dust done
clear
D)
Water Vapours done
clear
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question_answer30)
Which of the following materials is most suitable for a solar electrical cell?
A)
Iron done
clear
B)
Silicon done
clear
C)
Steel done
clear
D)
Aluminium done
clear
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question_answer31)
A solar cell converts ______
A)
chemical Energy to light energy done
clear
B)
light energy to electrical energy done
clear
C)
electrical energy to light energy done
clear
D)
light energy to chemical energy done
clear
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question_answer32)
Tube light glass : Semi transparent :: Mirror glass: ______
A)
Non-Luminous done
clear
B)
Transparent done
clear
C)
Reflector done
clear
D)
Opaque done
clear
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question_answer33)
Which of the following statement(s) is/are correct?
A)
An oily paper is translucent done
clear
B)
The shadow formed by a coloured object will be coloured done
clear
C)
Black thick paper is transparent done
clear
D)
None of the above is correct done
clear
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question_answer34)
Which of the following statement(s) is/are correct?
A)
Light travels in straight lines done
clear
B)
Luminous objects emit their own light done
clear
C)
Both the above done
clear
D)
None of above done
clear
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question_answer35)
Which of the following statement(s) is/are correct?
A)
The image formed in a pin hole camera is erect done
clear
B)
The image formed in a pin hole camera is not erect done
clear
C)
If we place a transparent object in the path of light the shadow formed will be much clearer done
clear
D)
None of these is correct done
clear
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question_answer36)
For the formation of shadow, essential conditions
A)
There should be a source of light done
clear
B)
There should be a screen done
clear
C)
An opaque substance should be placed between the source of light and screen done
clear
D)
All of the above done
clear
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question_answer37)
An object that emits light of its own is
A)
a luminous object done
clear
B)
a non-luminous object done
clear
C)
a source of light done
clear
D)
Both (a) and (c) done
clear
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question_answer38)
Luminous objects
A)
emit light during night time done
clear
B)
emit light during day time done
clear
C)
emit light of their own during day and night done
clear
D)
None of the above is correct. done
clear
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question_answer39)
Column I | Column II |
A. Lunar eclipse | (p) Has colour of the object |
B. Solar eclipse | (q) Always black |
C. Image | (r) Moon between sun and earth |
D. Shadow | (s) Earth between sun and moon. |
A)
\[A\to (s);B\to (p);C\to (r);D\to (q)\] done
clear
B)
\[A\to (p);B\to (q);C\to (r);D\to (s)\] done
clear
C)
\[A\to (s);B\to (r);C\to (q);D\to (p)\] done
clear
D)
\[A\to (s);B\to (r);C\to (p);D\to (q)\] done
clear
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question_answer40)
Column-I | Column-II |
A. Transparent substance | (p) It allows the light to pass through it almost completely |
B. Opaque substance | (q) It emits light of its own |
C. Luminous object | (r) It does not emit light of its own |
D. Non-luminous object | (s) It does not allow light to pass through it |
A)
\[A\to (p);B\to (q);C\to (r);D\to (s)\] done
clear
B)
\[A\to (q);B\to (p);C\to (s);D\to (r)\] done
clear
C)
\[A\to (p);B\to (r);C\to (q);D\to (s)\] done
clear
D)
\[A\to (p);B\to (s);C\to (q);D\to (r)\] done
clear
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question_answer41)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-1 Luminous objects give off their own light, such as the sun and stars. Fireflies and glow-worms are luminous. Non-luminous object do not give off light or glow. Sun is a
A)
non-luminous object done
clear
B)
luminous object done
clear
C)
transparent object done
clear
D)
opaque object done
clear
View Solution play_arrow
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question_answer42)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-1 Luminous objects give off their own light, such as the sun and stars. Fireflies and glow-worms are luminous. Non-luminous object do not give off light or glow. Fireflies is
A)
a glowing object done
clear
B)
a deep sea fish done
clear
C)
both (a) and (b) done
clear
D)
neither (a) nor (b) done
clear
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question_answer43)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-1 Luminous objects give off their own light, such as the sun and stars. Fireflies and glow-worms are luminous. Non-luminous object do not give off light or glow. Non-luminous objects
A)
have their own light done
clear
B)
are visible when they reflect the light fallen them from luminous objects done
clear
C)
do not give off light done
clear
D)
both (b) and (c) done
clear
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question_answer44)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-2 Take a comb in your right hand and bring it to your hair and look at yourself in mirror. You can see your own face in the mirror. This is your mirror image. In your mirror image you appear to be holding the comb in your
A)
left hand done
clear
B)
right hand done
clear
C)
comb is not visible done
clear
D)
None of these is correct done
clear
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question_answer45)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-2 Take a comb in your right hand and bring it to your hair and look at yourself in mirror. You can see your own face in the mirror. This is your mirror image. The images of an object formed in a pin hole camera and that in a mirror are
A)
quite similar done
clear
B)
quite different done
clear
C)
can't say done
clear
D)
All are incorrect done
clear
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question_answer46)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage-2 Take a comb in your right hand and bring it to your hair and look at yourself in mirror. You can see your own face in the mirror. This is your mirror image. The image formed in a mirror is due to
A)
reflection of light done
clear
B)
bending of light done
clear
C)
Both the above done
clear
D)
None of these done
clear
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question_answer47)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion" and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Shadow forms when light falls on a wooden block. Reason: Light is reflected when it bounces off surface.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer48)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion" and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Solar and lunar eclipses are results of shadow formation. Reason: Sun is essential for shadow formation.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer49)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion" and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Shadow is formed when an opaque object comes in the path of light. Reason: An opaque body does not allow any light to pass through it.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer50)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion" and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: When we look into the mirror, we see our own face inside the mirror. Reason: Mirror is made of a transparent substance that allows the light to pass through it.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer51)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion" and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: When the light from a source falls on a mirror it gets reflected. Reason: On being reflected there is no change in the direction of light.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer52)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion" and the other labelled as "Reason R ". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Mirror reflection gives clear images. Reason: Images are quite similar to shadows.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
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question_answer53)
DIRECTIONS: Read the following two statements carefully and choose the correct options. Statement-1: Light travels in a straight line. Statement-2: Light requires a medium to travel.
A)
Statement (1) is correct while statement (2) is incorrect. done
clear
B)
Statement (2) is correct while statement (1) is incorrect. done
clear
C)
Both statements are correct done
clear
D)
Both statements are incorrect. done
clear
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question_answer54)
The image formed by pinhole camera on the screen in the figure is
A)
erect and enlarged done
clear
B)
inverted and enlarged done
clear
C)
erect and diminished done
clear
D)
inverted and diminished done
clear
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question_answer55)
The figure shows a light ray moving towards smooth surface.
Which of the following arrow represents the possible direction of light ray after reflection?
A)
B)
C)
D)
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question_answer56)
Observe the diagram and choose the sequence of energy changes.
A)
Light Energy\[\to \]Chemical Energy\[\to \]Potential Energy done
clear
B)
Potential Energy\[\to \]Chemical Energy\[\to \]Kinetic Energy done
clear
C)
Solar Energy\[\to \] Chemical Energy\[\to \]Kinetic Energy done
clear
D)
Heat Energy\[\to \]Electrical Energy\[\to \]Mechanical Energy done
clear
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question_answer57)
What happens to a light beam when it passes through a translucent material such as waxed paper?
A)
Most of the light passes through done
clear
B)
Light is reflected in its incident path done
clear
C)
Most of the light is absorbed and very little is reflected done
clear
D)
Light is not allowed to pass through done
clear
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question_answer58)
A boy of length 10 m, to see his own complete image, requires a plane mirror at least equal to:
A)
10m done
clear
B)
5m done
clear
C)
3.33m done
clear
D)
2m done
clear
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question_answer59)
A plane mirror is in front of you in which you can see your image. It is approaching towards you at a speed of 10 cm/sec then at what speed will your image approach you?
A)
10 cm/sec done
clear
B)
5 cm/sec done
clear
C)
20 cm/sec done
clear
D)
15 cm/sec done
clear
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question_answer60)
What kind of eclipse do we see when the moon is entirely within the Earth's umbral shadow?
A)
Partial lunar done
clear
B)
Partial solar done
clear
C)
Total lunar done
clear
D)
Total solar done
clear
View Solution play_arrow
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question_answer61)
The size of a shadow of an opaque object close to the screen and away from the source of light
A)
increases done
clear
B)
decreases done
clear
C)
remains the same done
clear
D)
first decreases then increases done
clear
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question_answer62)
What happens to the image produced by a pinhole camera when you move the back wall farther from the pinhole? It becomes
A)
larger and fainter done
clear
B)
smaller and fainter done
clear
C)
larger and brighter done
clear
D)
smaller and brighter done
clear
View Solution play_arrow
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question_answer63)
A girl holding a ball in her right hand is standing in front of a mirror. The ball will seems to be in her
A)
right hand done
clear
B)
left hand done
clear
C)
depend on distance between girl and mirror done
clear
D)
depend on size of mirror done
clear
View Solution play_arrow
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question_answer64)
Non-luminous bodies become visible when they..........light.
A)
reflect done
clear
B)
radiate done
clear
C)
refract done
clear
D)
none of these done
clear
View Solution play_arrow
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question_answer65)
Which is the safest way to view a solar eclipse?
A)
Using a solar filter done
clear
B)
A pinhole filter done
clear
C)
Binoculars or telescope done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer66)
What is the correct alignment during a solar eclipse?
A)
Sun, Moon, Earth done
clear
B)
Moon, Sun, Earth done
clear
C)
Sun, Earth, Moon done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer67)
Select the objects that use reflection of light
A)
a mirror fixed on your dressing table done
clear
B)
the side mirror of your car done
clear
C)
a periscope done
clear
D)
All of the above done
clear
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question_answer68)
We can classify fog as
A)
transparent substance done
clear
B)
opaque substance done
clear
C)
translucent substance done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer69)
If we stand in front of a mirror with comb in our right hand, we will see that the image formed shows the comb in our
A)
right hand done
clear
B)
left hand done
clear
C)
either right hand or left hand done
clear
D)
sometimes in right hand and sometimes in left hand done
clear
View Solution play_arrow
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question_answer70)
Select the one that gives a clear reflection of ourselves
A)
stationary surface of clear water done
clear
B)
well polished surface of shoes done
clear
C)
smooth cushion surface done
clear
D)
All of these done
clear
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question_answer71)
A student was asked to observe the night sky and note down various objects observed by him in his note book. He listed the following objects (i) Stars (ii) Moon (iii) Clouds From amongst the above the sources of light in night sky are
A)
only done
clear
B)
(ii) only done
clear
C)
(iii) only done
clear
D)
and (ii) done
clear
View Solution play_arrow
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question_answer72)
When light falls on an opaque object
A)
it gets reflected and reaches our eye done
clear
B)
it passes through the object done
clear
C)
the opaque object sends a signal to our eye that enables us to see the object done
clear
D)
None of the above is correct done
clear
View Solution play_arrow
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question_answer73)
A tracing paper is a
A)
transparent substance done
clear
B)
transluscent substance done
clear
C)
opaque substance done
clear
D)
can't say done
clear
View Solution play_arrow
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question_answer74)
I have kept an object in my hand and through it tried to look at a lighted torch held against it. Nothing except a faint glow out lining the object is visible. The object in my hand is
A)
transparent done
clear
B)
transluscent done
clear
C)
opaque done
clear
D)
None of these is correct done
clear
View Solution play_arrow
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question_answer75)
Periscope, a device used in U-boats, makes use of
A)
reflection of light done
clear
B)
refraction of light done
clear
C)
shadow formation by opaque objects done
clear
D)
None of these done
clear
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question_answer76)
What happens when lightning occurs?
A)
Light comes from sun to cloud done
clear
B)
Light comes from cloud to earth done
clear
C)
Electric current flows in atmosphere done
clear
D)
Electric current flows from sun to cloud done
clear
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question_answer77)
Which of the following statement(s) is/are correct?
A)
Shadows are formed on the same side as the light source done
clear
B)
Shadows are formed on the opposite side to the light source done
clear
C)
Shadows give us an exact idea of the shape of the object done
clear
D)
None of these is correct done
clear
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question_answer78)
Which of the following statement(s) is/are correct?
A)
A shadow is formed when an opaque object comes in the path of light done
clear
B)
For the formation of shadow we need and opaque object and a source of light only done
clear
C)
The colour of shadow of an object will be different when seen in light coming from different sources done
clear
D)
All the above are correct. done
clear
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question_answer79)
An object that does not emit light of its own but is visible due to the light from a source of light falling on it, is
A)
luminous object done
clear
B)
non-luminous object done
clear
C)
either luminous or non-luminous done
clear
D)
None of these done
clear
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question_answer80)
Moon is considered a non-luminous object as
A)
it emits light only during night done
clear
B)
it does not emit its own light done
clear
C)
it is visible during night only done
clear
D)
All the above are correct done
clear
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question_answer81)
Transluscent body is one that
A)
allows almost whole of light to pass through it done
clear
B)
allows light to pass through it only partly done
clear
C)
through which we can see objects clearly done
clear
D)
None of the above is correct done
clear
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question_answer82)
The image formed by a pinhole camera is inverted because
A)
light travels in straight lines done
clear
B)
on passing through a pin hole camera there occurs a lateral inversion in the rays of light done
clear
C)
light rays get reflected in a pin hole camera done
clear
D)
None of the above is correct done
clear
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question_answer83)
For making a periscope, the number of mirrors needed is
A)
1 done
clear
B)
2 done
clear
C)
3 done
clear
D)
4 done
clear
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question_answer84)
A handicapped person has three fingers and has no thumb in his left hand but his right hand has four fingers as also the thumb. He holds a mirror in his right hand and looks at this own image in a mirror. In the mirror image he will appear as holding his comb with
A)
three fingers done
clear
B)
four fingers done
clear
C)
none of these done
clear
D)
can't say done
clear
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question_answer85)
DIRECTION: Match Column-I with Column-II and select the correct answer using the code given below the columns.
Column I | Column II |
A. Pin-hole camera | (p) Forms an inverted image |
B. Mirror | (q) Forms a lateral image |
C. Periscope | (r) Used in U-boats |
D. Kaleidoscope | (s) Makes use of reflection of light |
A)
\[A\to (p);B\to (q);C\to (r);D\to (s)\] done
clear
B)
\[A\to (p);B\to (r);C\to (s);D\to (q)\] done
clear
C)
\[A\to (q);B\to (p);C\to (r);D\to (s)\] done
clear
D)
\[A\to (s);B\to (p);C\to (q);D\to (r)\] done
clear
View Solution play_arrow
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question_answer86)
DIRECTION: Match Column-I with Column-II and select the correct answer using the code given below the columns.
Column I | Column II |
A. Light | (p) Shows that light travles in straight lines |
B. Luminous object | (q) An agent that produces a sensation of sight in us. |
C. Shadow formation | (r) Non-luminous object |
D. A pair of shoes | (s) An object that gives out light of its own |
A)
\[A\to (p);B\to (q);C\to (r);D\to (s)\] done
clear
B)
\[A\to (q);B\to (r);C\to (s);D\to (p)\] done
clear
C)
\[A\to (q);B\to (s);C\to (p);D\to (r)\] done
clear
D)
\[A\to (r);B\to (p);C\to (q);D\to (s)\] done
clear
View Solution play_arrow
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question_answer87)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage -1 On the basis of the given diagram answer the following questions.
'Region of full shadow' is called
A)
umbra done
clear
B)
penumbra done
clear
C)
source done
clear
D)
curved path done
clear
View Solution play_arrow
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question_answer88)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage -1 On the basis of the given diagram answer the following questions.
'Region of partial shadow' is called
A)
umbra done
clear
B)
penumbra done
clear
C)
source done
clear
D)
curved path done
clear
View Solution play_arrow
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question_answer89)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage -1 On the basis of the given diagram answer the following questions.
In solar eclipse, sun's light blocks out on the surface of
A)
Moon done
clear
B)
Sun done
clear
C)
Earth done
clear
D)
All of these done
clear
View Solution play_arrow
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question_answer90)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 You can make a simple periscope by placing two mirrors in a 'Z' shaped box as shown in figure below.
Periscope is advice
A)
used in U-boats done
clear
B)
that makes use of reflection of light done
clear
C)
Both the above done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer91)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 You can make a simple periscope by placing two mirrors in a 'Z' shaped box as shown in figure below.
Periscope is a device
A)
that uses reflections to see around corners done
clear
B)
that uses the property of light that light travels in straight lines done
clear
C)
Both the above done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer92)
DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 2 You can make a simple periscope by placing two mirrors in a 'Z' shaped box as shown in figure below.
Which of the following device makes use of reflection of light?
A)
Kaleidoscope done
clear
B)
Periscope done
clear
C)
Both of the above done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer93)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason Rare individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Shadow is always black. Reason: A shadow only shows the outline of an object.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer94)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason Rare individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Image has the colour of the object. Reason: Image gives only the outline of the object.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer95)
DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason Rare individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: In cars the windshields made of glass are used. Reason: Those substances through which things can be seen clearly are called transparent substances.
A)
Both A and R are true and R is the correct explanation of A. done
clear
B)
Both A and R are true but R is not the correct explanation of A. done
clear
C)
A is true but R is false. done
clear
D)
A is false but R is true. done
clear
View Solution play_arrow
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question_answer96)
DIRECTIONS: Read the following three statements carefully and choose the correct option. Statement - 1: The length of shadow formed by sunlight remains constant with time. Statement - 2: The speed of light in air is \[3\times {{10}^{8}}\text{m/s}\text{.}\]. Statement - 3: Speed of light remains same in all medium.
A)
Statement (1) and (3) are incorrect while statement (2) is correct. done
clear
B)
Statement (1) and (2) are incorrect while (3) is correct. done
clear
C)
All the statements are correct. done
clear
D)
All the statements are incorrect. done
clear
View Solution play_arrow
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question_answer97)
When parallel rays of light are incident on an irregular surface as shown in the figure, which phenomenon of light occurs?
A)
Regular reflection done
clear
B)
Diffuse reflection done
clear
C)
Dispersion done
clear
D)
Refraction done
clear
View Solution play_arrow
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question_answer98)
The less dark region in the given image is called
A)
umbra done
clear
B)
penumbra done
clear
C)
dark region done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer99)
A lamp, a ball and a paper are kept as shown in the figure below. What will be the change in the shadow, if the ball is moved from A to B?
A)
Become large done
clear
B)
Remain same done
clear
C)
Become small done
clear
D)
Get distorted done
clear
View Solution play_arrow
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question_answer100)
Look at the picture and answer the question given below:
Why is a dark shadow not formed by glass tumbler?
A)
The source of light is not a strong source done
clear
B)
It is not night time done
clear
C)
The tumbler is made of transparent material done
clear
D)
All the above are correct done
clear
View Solution play_arrow