A double convex lens has power P and same radii of curvature R of both the surfaces. The radius of curvature of a surface of a plano-convex lens made of the same material with power 1.5 P is:   1) R / 3 2) 3R / 2 3) R / 2 4) 2R

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

 

  1. 1) R / 3
  2. 2) 3R / 2
  3. 3) R / 2
  4. 4) 2R
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