Published by:
CGP EDU Academic Team
Published on: August 11, 2026
A light wave travelling linearly in a medium of dielectric constant 4 , incident on the horizontal interface separating medium with air. The angle of incidence for which the total intensity of incident wave will be reflected back into the same medium will be (Given : relative permeability of medium 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
For total internal reflection, 
Also 
From (1), 
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