A compound microscope with an objective of `1.0 cm` focal length and an eye piece of `2.0 cm` focal length has a tube length of `20 cm`. Calculate the magnifying power of microscope is final image is formed at the near point of eye.
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Here, `f_(0) = 1.0 cm, f-(e) = 2.0 cm`, `L = 20 cm, d = 25 cm` When final image is formed at the near point of the eye (at least distance `d` of distinct vision), then `m = (L)/(f_(0))(1 + (d)/(f_(e))) = (20)/(1.0)(1 + (25)/(2)) = 270`
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