1.

The magnifying power of a microscope with an objective of 5 mm focal length is 400. The length of its tube is 20 cm. Then the focal length of the eye-piece is [MP PMT 1991]

A. 200 cm
B. 160 cm
C. 2.5 cm
D. 0.1 cm
Answer» D. 0.1 cm


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