Optics Question 940

Question: A concave mirror of focal length f (in air) is immersed in water ( $ \mu =4/3 $ ). The focal length of the mirror in water will be

[MNR 1998]

Options:

A) $ f $

B) $ \frac{4}{3} $ $ f $

C) $ \frac{3}{4}f $

D) $ \frac{7}{3} $ $ f $

Show Answer

Answer:

Correct Answer: A

Solution:

Focal length of the mirror remains unchanged.



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