In a plano-convex lens,the radius of curvature of convex lens is 10 cm and the focal length is 30 cm.The refractive index of the material of the lens will be ------

Options :
  1. 1.5
  2. 1.66
  3. 1.33
  4. 3


Answer and Explanation :-

Answer: Option 3

Explanation:

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