Multiple Choice Questions on If the focal length of the biconvex lens is 25 cm then the power of the lens will be ........ for General Studies (Level 1) Preparation

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Multiple Choice Questions

If the focal length of the biconvex lens is 25 cm then the power of the lens will be ........

General Science (Easy) Physics
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If the focal length of the biconvex lens is 25 cm, then the power of the lens will be

+ 4 dioptre

Correct Answer

– 4 dioptre

Incorrect Answer

+ 0.04 dioptre

Incorrect Answer

– 0.04 dioptre

Incorrect Answer
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Explanation:

+ 4 dioptre

Given:-
P=1/f   f=25cm=0.25m

P=1/0.251?=4D

Since, it is a convex lens, the power is positive. Thus, P=+4D

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