Reflection of light : The phenomenon coming back of light into the same medium after following on a smooth and polished surface is called reflection of light.
Activity 1:
Ask your friend to hold a plane mirror in his hand and stand in a corner of a dark room. Cover the glass of a torch with your palm and switch it on. To get a beam of light leave some space between your fingers. Throw this beam of light on the plane mirror held by your friend, you would notice the spots of light. Now change the direction of torch so that the image of some other friend standing in the room is formed in the mirror.
This activity shows that the mirror reflects the light falling on its surface.
Activity 2:
Fix a comb on one side of a white thermocol sheet and fix a mirror on the other side as shown in fig. Fix a dark coloured sheet of paper between the comb and the mirror. Now project a beam of light from a torch through the comb on the mirror. You will see a pattern as shown in the figure.
This activity shows that mirror changes the direction of light that falls on it. which is due to reflection of light.
