Q. 234.3( 17 Votes )

What can you see in a completely dark room? If you switch on an electric bulb in this dark room as a light source, explain how you could now see:

(a) The electric bulb

(B) a piece of white paper.

Answer :

When we see in a completely dark room, we see nothing as there is any light in the dark room.

(a) If we switch on an electric bulb in this dark room as a light source we can see bulb due to the light emitted by it.


(b) If we switch on an electric bulb in this dark room as a light source we can see a piece of white paper as it reflects the light from the bulb falling on it.


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