Questions

In a plano-convex lens the radius of curvature of the convex lens is 10 cm. If the plane side is polished, then the focal length will be (Refractive index = 1.5)

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10.5 cm

10 cm

5.5 cm

5 cm

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detailed solution

Correct option is B

f=R2(μ−1)=102(1.5−1)=10cm

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