Question

After few days that mirror becomes dirty. During cleaning, Rajesh held the mirror

Inside the water. So, what should be the change in the focal length of the mirror?

(a) Increases (b)decreases

(c) no change (d)none of the above​

Answer 1

Answer:

$C) No \: \: change \:$

In case of spherical mirror there will be no change in focal length of the mirror when immersed in water. This is because focal length does not depend on the medium.

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