Published by:
CGP EDU Academic Team
Published on: September 13, 2026
In a medium the speed of light wave decreases to 0.2 times to its speed in free space The ratio of relative permittivity to the refractive index of the medium is x : 1. The value of x is_____.
(Given speed of light in free space = 3x10 m s -1 and for the given medium 
= 1)
Text Solution
Verified by ExpertsThe correct answer is:
5
(5)
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