Question

Focal length of lens kept in water _______________

Answer 1

Answer:

Originally Answered: Will the focal length of lens change when it is immersed in water? Yes the focal length will increase over that in air. This is the lens maker's formula for the power of a lens ( power is one over the focal length). Index of refraction of the glass is nlens, usually about 1.5 for typical glass.

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Answer 2

Answer:

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