The ratio of speeds of electromagnetic waves in vacuum and a medium, having dielectric constant 
and permeability of 
, is ( 
permeability of vacuum)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Speed of electromagnetic wave in vacuum: 
Speed in a medium with permeability 
and dielectric constant 
:
Ratio of speeds: 
Therefore: 
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