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Physics
A concave mirror of focal length f in vacuum is placed in a medium of refractive index 2. Its focal length in the medium is
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Q. A concave mirror of focal length f in vacuum is placed in a medium of refractive index 2. Its focal length in the medium is
CMC Medical
CMC Medical 2007
A
$ \frac{f}{2} $
B
$ f $
C
$ 2f $
D
$ 4f $
Solution:
Focal length of mirror is independent of the refractive index of medium in which it is placed.