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question_answer1)
X is a surface that cannot produce clear images. What is X?
A)
Rough surface done
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B)
Ideal surface done
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C)
Smooth surface done
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D)
Smooth but curved surface done
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question_answer2)
With what is glass coated in order to convert it into a mirror?
A)
Silver done
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B)
Copper done
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C)
Aluminium done
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D)
Platinum done
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question_answer3)
What makes objects visible?
A)
The absorption of light by objects done
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B)
The reflected light from the object done
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C)
The total internal reflection taking place in an object done
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D)
The refracted light from the object done
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question_answer4)
What is the phenomenon of light bouncing back into the same medium called?
A)
Reflection done
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B)
Refraction done
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C)
Dispersion done
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D)
Splitting done
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question_answer5)
What is the perpendicular drawn at any point on a mirror called?
A)
Incident ray done
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B)
Reflected ray done
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C)
Normal done
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D)
Image done
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question_answer6)
How many images are obtained when plane mirrors are arranged parallel to each other?
A)
A single image done
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B)
Two images done
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C)
Infinite number of images done
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D)
Zero image done
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question_answer7)
If the angle of incidence is \[{{80}^{o}},\] what will be the angle of reflection?
A)
\[{{80}^{\text{o}}}\] done
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B)
\[{{100}^{\text{o}}}\] done
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C)
\[{{160}^{\text{o}}}\] done
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D)
\[{{20}^{\text{o}}}\] done
clear
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question_answer8)
Which of the following is used by E.N.T. doctors?
A)
Convex mirror done
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B)
Convex lens done
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C)
Plane mirror done
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D)
Concave mirror done
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question_answer9)
A When the angle between two plane mirrors is \[60{}^\circ \], how many images will be formed by the mirrors?
A)
5 done
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B)
6 done
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C)
7 done
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D)
8 done
clear
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question_answer10)
If the angle of incidence is \[{{50}^{\text{o}}}\], then calculate the angle between the incident ray and the reflected ray.
A)
\[{{50}^{\text{o}}}\] done
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B)
\[{{100}^{\text{o}}}\] done
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C)
\[{{130}^{\text{o}}}\] done
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D)
\[{{80}^{\text{o}}}\] done
clear
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question_answer11)
In our houses, which of the following is used for looking at ourselves?
A)
Convex mirror done
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B)
Concave mirror done
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C)
Convex lens done
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D)
Plane mirror done
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question_answer12)
Which of the following statements is true?
A)
The angle of incidence is twice the angle of reflection. done
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B)
The incident ray, the reflected ray and the normal drawn at the point of incidence lie in the same plane. done
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C)
Some virtual images can be caught on the screen. done
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D)
A convex mirror forms a real image. done
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question_answer13)
What happens in lateral inversion?
A)
The right side of the object will be on the right side of the image. done
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B)
The left side of the object will be on the left side of the image. done
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C)
The top of the object will be the bottom of the object. done
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D)
The right side of the object will be on the left side of the image. done
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question_answer14)
In a periscope, how are the reflecting mirrors arranged?
A)
Perpendicular to each other done
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B)
Parallel to each other done
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C)
At an angle of \[{{90}^{\text{o}}}\] done
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D)
At an angle of \[{{60}^{\text{o}}}\] done
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question_answer15)
What is the nature of image formed on the retina of human eye of an object?
A)
Virtual and erect done
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B)
Virtual and inverted done
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C)
Real and erect done
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D)
Real and inverted done
clear
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question_answer16)
Identify the value of persistence of vision.
A)
1/1 0th of a second done
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B)
1/12th of a second done
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C)
1/16th of a second done
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D)
1/20th of a second done
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question_answer17)
The characteristics of an eye disease are given below.
(i) Eye sight becomes foggy |
(ii) Eye lens becomes cloudy |
(iii) There is a loss of vision |
In which of the following are the above characteristics observed?
A)
Myopia done
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B)
Presbyopia done
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C)
Hypermetropia done
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D)
Cataract done
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question_answer18)
Which of the following is the requirement of nocturnal animals like owl an bat?
A)
Large cornea done
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B)
Large pupil done
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C)
Retina with large number of rods done
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D)
All of the above done
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question_answer19)
Look at the given figure.
Find the angle between the incident ray and the reflected ray.
A)
\[{{60}^{\text{o}}}\] done
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B)
\[{{90}^{\text{o}}}\] done
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C)
\[{{80}^{\text{o}}}\] done
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D)
\[{{40}^{\text{o}}}\] done
clear
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question_answer20)
The diagram shows the path of a light ray X, directed at a plane mirror.
Which of the following is the correct reflected ray?
A)
M done
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B)
N done
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C)
O done
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D)
P done
clear
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question_answer21)
For a given incident ray, the plane of the mirror makes an angle\[\theta \]with the incident ray, then the reflected ray is turned through\[2\theta .\]Which of the following is based on the above principle?
A)
Periscope done
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B)
Kaleidoscope done
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C)
Shaving mirrors done
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D)
Automobile head lights done
clear
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question_answer22)
An object placed 4 m from a plane mirror 'Br is shifted by 0.5 m away from the mirror. What is the distance between the object and its image?
A)
4 m done
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B)
3.5 m done
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C)
9 m done
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D)
5 m done
clear
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question_answer23)
There are 11 letters in the word EXAMINATION. How many letters of this word are not changed when the word is seen in a plane mirror?
A)
11 done
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B)
5 done
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C)
8 done
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D)
9 done
clear
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question_answer24)
Observe the figure given below.
Find the angle between the incident and the reflected ray.
A)
\[{{65}^{\text{o}}}\] done
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B)
\[{{90}^{\text{o}}}\] done
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C)
\[{{130}^{\text{o}}}\] done
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D)
25 done
clear
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question_answer25)
How is a rainbow formed?
A)
When raindrops absorb sunlight done
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B)
When raindrops reflect sunlight done
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C)
When raindrops disperse sunlight done
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D)
When raindrops diffract sunlight done
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question_answer26)
Which of the following letters will be seen without any change in a plane mirror?
A)
S done
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B)
T done
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C)
L done
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D)
P done
clear
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question_answer27)
Which of the following is the characteristic of an ideal mirror?
A)
It absorbs all the amount of light incident on it. done
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B)
It refracts all the light. done
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C)
It reflects all the light. done
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D)
All of the above done
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question_answer28)
In which of the following are plane mirrors arranged at an angle to get a number of colored images?
A)
Periscope done
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B)
Kaleidoscope done
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C)
Telescope done
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D)
Thermoscope done
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question_answer29)
A series of fast moving still pictures can create an illusion of movement. Why?
A)
The eye can focus on very rapidly changing pictures. done
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B)
The eye is quicker than the brain. done
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C)
The eye can separate two images only when the interval of separation between them is one-sixteenth of a second. done
clear
D)
The optical cortex can see through the rapidly moving images. done
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question_answer30)
Which of the following prevents internal reflections of light inside the human eye?
A)
Iris done
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B)
Pupil done
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C)
Choroid done
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D)
Blind spot done
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question_answer31)
For a normal eye, in an adult, what is the least distance of distinct vision?
A)
5 to 8 cm done
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B)
10 to 15 cm done
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C)
20 to 25 cm done
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D)
30 to 35 cm done
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question_answer32)
Identify the part of the human eye on which different images are formed.
A)
Iris done
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B)
Pupil done
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C)
Cornea done
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D)
Retina done
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question_answer33)
Identify the nature of the image formed by the eye lens of a human eye.
A)
Real, upright and enlarged done
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B)
Real, upright and diminished done
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C)
Real, inverted and diminished done
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D)
Virtual, inverted and diminished done
clear
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question_answer34)
Which of the following occurs in persons suffering from myopia?
A)
The eye ball is shortened. done
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B)
Ciliary muscles contract. done
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C)
The eye ball elongates. done
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D)
The retina expands. done
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question_answer35)
According to the laws of reflection, which of the following statements is correct?
A)
The angle of incidence is greater than the angle of reflection. done
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B)
The angle of incidence is less than the angle of reflection. done
clear
C)
The angle of incidence is equal to the angle of reflection. done
clear
D)
The angle of incidence is not equal to the angle of reflection. done
clear
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