The focal length of the piano – convex lens is 2R. Its radius of curvature is R then the refractive index of the material used is ………………
The focal length of the piano – convex lens is 2R. Its radius of curvature is R then the refractive index of the material used is ………………
A) 2
B) 1.5
C) 1/2
D) 1
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