Question

A converging lens of refractive index 1.5 and of focal length 15 cm in air has the same radii of curvature of either face what is the refractive index of a material of a lens

Answer 1

Answer -

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• A spherical surface of radius of curvature R separates air (refractive index 1.0) from glass ... A concave lens of glass, refractive index 1.5 , has both surfaces of the same radius.

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