A refracting telescope required to work in normal adjustment should have a magnifying…

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

Problem

A refracting telescope required to work in normal adjustment should have a magnifying power of 20. If the objective lens available has a focal length of 120 cm120\,\text{cm}, determine the focal length of the eyepiece that must be used.

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