Question:
The radius of curvature of the curved surface of a plano convex lens is 20 CM. if the refractive index of the material of the lens be 1.5, then the focal length of the lens will be :
The radius of curvature of the curved surface of a plano convex lens is 20 CM. if the refractive index of the material of the lens be 1.5, then the focal length of the lens will be :
Updated On: Mar 12, 2025
- 20 cm
- -20 cm
- 40 cm
- 40 cm
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The Correct Option is D
Solution and Explanation
The correct answer is (D): 40 cm
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