9.10 What is the focal length of a convex lens of focal length 30 cm in contact with…

PHYSICS · Subjective · CBSE · Physics · Ray Optics and Optical Instruments · Ray Optics and Optical Instruments

Problem

9.10 What is the focal length of a convex lens of focal length 30 cm in contact with a concave lens of focal length 20 cm ? Is the system a converging or a diverging lens? Ignore thickness of the lenses.

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