Question

focl length of convex lens is ___
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Answer 1

Explanation:

A thin convex lens is made of two materials with refractive indices n1 and n2, as shown in figure. The radius of curvature of the left and right spherical surfaces are equal. f is the focal length of the lens when n1=n2=n. The focal length is f+Δf when n1=n and n2=n+Δn

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Answer 2

Explanation:

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