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The radius of curvature of curved surface of a plano-convex thin lens of refractive index n = 3 of focal length 0.4 m is
  • a)
    0.1 m
  • b)
    0.2 m
  • c)
    0.4 m
  • d)
    0.8 m
Correct answer is option 'D'. Can you explain this answer?
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The radius of curvature of curved surface of a plano-convex thin lens ...
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The radius of curvature of curved surface of a plano-convex thin lens ...
Explanation:

The radius of curvature of a curved surface of a lens is given by the formula:

R = 2f / (n - 1)

where R is the radius of curvature, f is the focal length, and n is the refractive index of the lens.

In this case, we are given that the refractive index of the lens is n = 3 and the focal length is f = 0.4 m.

Using the formula, we can calculate the radius of curvature:

R = 2 * 0.4 / (3 - 1)
= 0.8 / 2
= 0.4 m

Therefore, the radius of curvature of the curved surface of the lens is 0.4 m.

Summary:

The radius of curvature of the curved surface of the plano-convex thin lens with a refractive index of n = 3 and a focal length of 0.4 m is 0.4 m.
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