Question

A.
54. A convex lens, whose focal length is
10 cm, is immersed in water. Find the
focal length in water?
A) increases B) decreases
C) do not change D) becomes zero​

Answer 1

Answer:

increaces

Explanation:

Answer 2

Explanation:

The focal length always changes when the length is immersed in water.

Since the refractive index changes when the convex lens is immersed in water, therefore the focal length also changes as per as the lens makers formula.

As we know that the focal length is inversely proportional to mu one, there for the focal length in the convex lens when we dip in the water will increases.

Therefore, we can say that focal length will increase when we immersed you a convex lens in water.

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