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Physics
The magnifying power of a compound microscope increase with
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Q. The magnifying power of a compound microscope increase with
AIIMS
AIIMS 2008
Ray Optics and Optical Instruments
A
the focal length of objective lens is increased and that of eye lens is decreased
17%
B
the focal length of eye lens is increased and that of objective lens is decreased
31%
C
focal lengths of both objects and eye-piece are increased
22%
D
focal lengths of both objects and eye-piece are decreased
31%
Solution:
Magnifying power of compound microscope
$M=-\frac{v_{t}}{u_{o}}\left(1+\frac{D}{f_{e}}\right)=-\frac{L}{f_{o}}\left(1+\frac{D}{f_{e}}\right)$