Chapter 16 . Light

1.Part of the eye which controls the light entering is called
(a)iris         
(b)cornea  (c)lens  (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.

Photo

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