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if the curved surface of plano convex lens is silvered then wat is the formula to find its focal length ?

if the curved surface of plano convex lens is silvered then wat is the formula to find its focal length ?

Grade:12

1 Answers

Abhishek Kumar
askIITians Faculty 253 Points
6 years ago
Since plane surface is silvered, it acts as a mirror of focal length equal to the focal length of the curved surface.
So, 1/fc = 1/flens + 1/fmirror + 1/flens (Ray has first refraction, then reflection then again refraction brfore emerging out)

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