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question_answer1)
Which one of the following is correct?
A)
B)
C)
D)
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question_answer2)
Which of the following ray diagrams shown below represents the image formed by the convex lens when the object is placed beyond 2F?
A)
B)
C)
D)
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question_answer3)
If two plane mirrors are inclined at an angle of \[\text{90 }\!\!{}^\circ\!\!\text{ }\] to each other, how many images of an object are seen?
A)
Only 1 done
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B)
Only 2 done
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C)
Only 3 done
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D)
Any of 1, 2, 3 or 4 depending on the position of observer and object. done
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question_answer4)
Which of the following statements are correct regarding the image formed by a concave lens?
(i) The nature of image does not change much with the change in the object distance. |
(ii) Always a virtual image is formed. |
(iii) The image is larger in size. |
(iv) Image is never formed between the optical centre and the focus. |
A)
Only (i), (ii) and (iii) done
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B)
Only (i) and (ii) done
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C)
Only (iii) and (iv) done
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D)
Only (ii), (iii) and (iv) done
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question_answer5)
If a person wants to see an enlarged image of the object by using a convex lens then the lens must be held
A)
Close to the object so that the object lies within the focal length of the lens done
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B)
Far from the object so that the object lies beyond 2F done
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C)
At infinity done
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D)
Far from the object so that the object lies at 2F. done
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question_answer6)
Which of the following ray diagrams shown below shows respectively the short sightedness condition and its correctness by using a lens?
A)
(a) and (d) done
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B)
(a) and (c) done
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C)
(b) and (d) done
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D)
(b) and (c) done
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question_answer7)
A prism splits up light into different colours but a glass slab does not show dispersion because
A)
The emergent ray is deviated from the direction of the incident ray by the angle of deviation done
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B)
The incident and emergent rays are parallel to each other done
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C)
The emergent ray is laterally displaced from glass slab and changes its direction done
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D)
The incident and emergent rays are not parallel to each other done
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question_answer8)
The diagram shows a ray of light reflected at a plane mirror.
|
Which pair of the angle of incidence and angle of reflection is correct?
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|
A)
B)
C)
D)
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question_answer9)
For the myopic eye, the defect is cured by
A)
Convex lens done
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B)
Concave lens done
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C)
Cylindrical lens done
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D)
None of these. done
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question_answer10)
An optician holds a test card 50 cm behind a patient. The patient then looks in the plane mirror which is 100 cm away. How far away from the patient's eyes is the image of the test card?
A)
100 cm done
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B)
150 cm done
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C)
200 cm done
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D)
250 cm done
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question_answer11)
The diagram shows a ray PQR travelling through a glass slab. Which option in the table gives the correct name for all three rays?
A)
B)
C)
D)
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question_answer12)
A narrow beam of white light is passed through a glass prism as shown in the figure.
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|
Which of the following is the correct order of colours emerging from the prism?
|
A)
B)
C)
D)
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question_answer13)
A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves the source of light away from the lens on its principal axis, the intensity of light
A)
Remains constant done
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B)
Continuously increases done
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C)
Continuously decreases done
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D)
First increases than decreases. done
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question_answer14)
Three light bulbs are concealed from an observer by an opaque wall as shown. Without shifting the positions of the observer and the bulbs, the images of which of the bulbs can the observer see from the plane mirror?
A)
P and P done
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B)
P and Q done
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C)
Only P done
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D)
Q and R done
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question_answer15)
United Football Club are playing an evening match. The team's jersey has blue and white stripes. What colour would the stripes appear under floodlights which produce a yellow light?
A)
Black and yellow done
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B)
Blue and white done
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C)
Blue and yellow done
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D)
Black and white done
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question_answer16)
Match the column I with column II and column III and select correct option from the codes given below. (Note: These columns are for convex lens.)
|
Column I (Position of the object) |
|
Column II (Position of the image) |
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Column III (Type of Image |
(a) |
Object beyond 2F |
(i) |
At 2F |
(p) |
Real, inverted, large |
(b) |
Object at 2F |
(ii) |
Same side as the object |
(q) |
Virtual, erect, magnified |
(c) |
Object between F and 2F |
(iii) |
Beyond 2F |
(r) |
Real, inverted, same size |
(d) |
Object within the focal length |
(iv) |
Between F and 2F |
(s) |
Real, inverted, diminished |
A)
B)
C)
D)
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question_answer17)
Read the given statements and select the correct option.
Statement 1: A beam of light emitted by the point source placed in water always diverges in air. |
Statement 2: The refracted ray moves away from normal when a ray goes from a denser medium to a rarer medium. |
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
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B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
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C)
Statement 1 is true but statement 2 is false. done
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D)
Both statements 1 and 2 are false. done
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question_answer18)
Consider the following statements and select the option which correctly identifies true (T) and false (F).
(i) Part that gives colour to the eye is iris. |
(ii) Transparent outer layer that refracts light is lens. |
(iii) Retina is a light sensitive layer of the eye. |
(iv) Cornea is a region without any sensory cells. |
A)
B)
C)
D)
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question_answer19)
Two plane mirrors AB and CD are placed at right angles to one another. A ray of light PQ hits AB at Q making an angle of \[\text{45 }\!\!{}^\circ\!\!\text{ }\] as shown in the diagram. This ray will be reflected from mirror CD at an angle.
A)
\[\text{20 }\!\!{}^\circ\!\!\text{ }\] done
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B)
\[\text{35 }\!\!{}^\circ\!\!\text{ }\] done
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C)
\[\text{45 }\!\!{}^\circ\!\!\text{ }\] done
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D)
\[\text{60 }\!\!{}^\circ\!\!\text{ }\] done
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question_answer20)
In the diagram, the coin is just out of sight. If water is poured into the metal can, the coin will
A)
Become visible done
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B)
Appear smaller done
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C)
Not be visible done
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D)
Float to the surface. done
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