A plano-convex lens when silvered in the plane side behaves like a con – McqOptions

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1.	A plano-convex lens when silvered in the plane side behaves like a concave mirror of focal length 30cm. However, when silvered on the convex side it behaves like a concave mirror of focal length 10 cm. Then the refractive index of its material will be [BHU 1997; UPSEAT 1995]
A.	3.0
B.	2.0
C.	2.5
D.	1.5
Answer» E.

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