Ray Optics and Optical Instruments

Question: A thin double convex lens has radii of curvature each of magnitude 40 cm and is made of glass with refractive index 1.65. Its focal length is nearly

1) 20 cm

2) 31 cm

3) 35 cm

4) 50 cm

Solution:

Explanation: No Explanation

Refraction at Curved Surface

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