Ray Optics and Optical Instruments

Question: The radius of the convex surface of plano-convex lens is 20 cm and the refractive index of the material of the lens is 1.5. The focal length of the lens is



1) 30 cm
2) 50 cm
3) 20 cm
4) 40 cm
Solution: Explanation: No Explanation
Refraction at Curved Surface

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