If 
and 
are the permittivity and permeability of free space and 
and 
are the corresponding quantities for a medium, then refractive index of the medium is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
The speed of light in a vacuum is given by
The speed of light in a medium is given by
The refractive index 
is
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