Question

Does focal length of a spherical mirror change when it is completely immeresed in ware ? Predict and write reason

Answer 1

$\huge\colorbox{cyan}{Answer:-}$

==>In case of spherical mirrors (both concave and convex), there will be no change in the focal length of the mirrors when immersed in water. This is because the focal length of mirrors does not depend on the external medium in which it is held.

$\huge\mathcal\pink{Explanation:-}$

==>When kept inside water, the laws of reflections are still valid, thus the focal length of the concave mirror does not change. ... Since water has a greater value of refractive index than air, the converging power of the lens will be less as compared to air. Thus the focal length of the convex lens will increase.

$\huge\mathbb\blue{\fcolorbox{blue}{red}{Thank you}}$