Published by:
CGP EDU Academic Team
Published on: August 13, 2026
An electromagnetic wave of frequency 
passes from vacuum into a dielectric medium with relative permittivity 
. Then
Text Solution
Verified by ExpertsThe correct answer is:
C
Refractive index 
Here 
is not specified so we can consider 
then refractive index 
Speed and wavelength of wave becomes half and frequency remain unchanged.
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