A normal eye is not able to see objects closer than 25 cm because (a) the focal length of the eye is 25 cm (b) the distance ,
The focal length of the objective of a compound microscope is fo and its distance from the eyepiece is L. The object is placed at a distance u from the objective. For proper working of the instrument,
(a) L < u
(b) L > u
(c) fo < L < 2fo
(d) L > 2fo.
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