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A double convex lens has power P and sam...

A double convex lens has power P and same radii of curvature R of both the surfaces. The radius of carvature of a surface of plano-convex lens made of the same meterial with power 1.5 P is :

A

2R

B

`R/2`

C

`(3R)/2`

D

`R/3`

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