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A student performs an experiment on find...

A student performs an experiment on finding the focal length of a convex lens by keeping a lighted candle on one end of laboratory table, a screen on its other end and the lens between them as shown in the figure. The positions of the three are adjusted to get a sharp image of the candle flame on the screen.
If now the candle flame were to be replaced by a distant lamp on a far away electric pole, the student would be able to get a sharp image of this distant lamp on the screen by moving :

A

the screen towards of the lens or the lens towards the screen.

B

the screen towards of the lens or the lens away from the screen.

C

the screen away from the lens or the lens towards the screen.

D

neither the screen nor the lens

Text Solution

Verified by Experts

The correct Answer is:
a
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