Take a plane mirror and stand in front of a building in open space during the day. Let the sunlight falls on the mirror. Now rotate the mirror in such a way that a spot of light falls on the wall of the building with no sunlight. Why is the spot of light formed on the wall ? when incident light of sun falls on a plane mirror then mirror changes the direction of the incident light that falls on it.
You can perform similar activity in a dark room. Take cardboard and make a hole in it using a nail. Stand in the middle of room and cover the glass of torch by this card board. Ask your friend to stand in the corner of the room with plane mirror in his hand. Switch on the torch and place it such that the light falls on the plane mirror. Adjust the direction of the torch in such a way that a spot of light falls on the wall of the room. It can be conclude that plane mirror changes direction of light that falls on it. In this activity light travels in air, strikes the plane mirror and returns back in the same medium.
Place a bucket full of water near the wall of a room and focus light on the water surface. You will see that water surface acts like a mirror and can turn the path of incident light. Take a shining steel plate or spoon and watch the reflection of light caused by it.
1. Why is the spot of light formed on the wall of the building?
2. What is known as reflection of light?
