Question:
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 teacher's advice?
Answer:
Laser light is harmful for the human eyes, because its intensity is very high. It can cause damage to the retina and lead to blindness. Hence, it is advisable not to look at a laser beam directly.
Q 3.
(a)Find out the position of the image of an object situated at A in the plane mirror (Fig. 16.21).(b)Can Paheli at B see this image?(c)Can Boojho at C see this image?(d)When Paheli moves from B to C, where does the image of A move?