1. Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room. Explain.
(a) A person 1 m in front of a plane mirror seems to be _______________ m from his image.
(c) The size of the pupil becomes ____________ when you see in dim light.
(d) Night birds have ____________ cones than rods in their eyes..
10. Draw a labeled sketch of the human eye.
11. Gurmit wanted to perform Activity 16.8 using a laser torch. Her teacher advised her not to do so. Can you explain the basis of the teachers advise?
16. Fig. 16.19 16. Boojho stands at A just on the side of a plane mirror as shown in Fig. 16.20. Can he see himself in the mirror? Also can he see the image of objects situated at P, Q and R? Fig. 16.20 17.