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A compound microscope has a magnificatio...

A compound microscope has a magnification of 30. The focal length of eye piece is 5 cm. Assuming the final image to be at least distance of distinct vision, find the magnification . produced by the objective.

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Magnification of compound microscope , M = 30
Focal length , f = 5 cm
Least distance of distinct vision, D = 25 cm
Now `M = M_(o) xx M_(e)`
` = M_(o) xx [ 1+ (D)/(f_(e))]`
` 30 = M_(o) xx [ 1+(25)/(5)] rArr M_(o) = (30)/(6) = 5`
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