Standard Books Physics Lenses MCQ Question with Solution

A convex lens of focal length 0.2 m and made of glass (μ_glass = 1.5) is immersed in water (μ_water = 1.33). The change in the focal length of the lens is

A

5.8 m

B

0.58 cm

C

0.58 m

D

5.8 cm

Correct Answer

Option C

Detailed Explanation

The focal length changes due to the change in the refractive index of the surrounding medium. The new focal length is calculated to be 0.58 m. Hence, option (C) is correct.

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