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Power and Thin Lenses in Contact

The focal len...

Question

The focal length of an equi-convex lens in air is equal to either of its radii of curvature. The refractive index of the material of the lens is:

A

2.5

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B

4/3

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C

1.5

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D

0.8

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Solution

The correct option is C
1.5

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