Light chapter ka multiple aur question answer pura answer question

90 EXEMPLAR PROBLEMS




16 Light

MULTIPLE CHOICE Q UESTIONS

1. Part of the eye which controls the light entering is called
(a) iris (c) lens
(b) cornea (d) retina
2. We can see a non-luminous object when light:
(a) emitted by the object falls on the eye.
(b) is reflected from the object towards our eye.
(c) completely passes through the object.
(d) gets completely absorbed by the object.
3. Light is falling on surface S1 , S2, S3 as shown in Fig.16.1.




Fig.16.1




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, LIGHT 91

Surfaces on which the angle of incidence is equal to the angle of
reflection is/are
(a) S1 only (c) S2 and S3
(b) S1 and S2 only (d) all the three surfaces

4. A tiny mirror M is fixed on a piece of cardboard placed on a table.
The cardboard is illuminated by light from a bulb. The position
of eye with respect to position of bulb is shown in Fig.16.2 as A,
B, C and D. In which position mirror will be visible?



Bulb Eye Bulb Eye




M M
(A) (B)

Eye

Bulb
Eye




Bulb


M M

(C) (D)

Fig. 16.2

a. A c. C
b. B d. D




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