Question

The focal length of a convex lens of glass is . The focal length of the lens when immersed in a liquid of refractive index will be :

A

B

C

D

Medium
Solution
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Correct option is A)

Casr lens in air
Let the focal length of lens in air be fair

Given that:




Case lens in water




Dividing by we get


Solve any question of Ray Optics and Optical Instrument with:-
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