A ray of light 
in vacuum is incident on a glass slab at angle 
and refracted at angle 
along 
as shown in the figure. The optical path length of light ray from 
to 
is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
JEE Main 2019
From the given figure
As 
Optical path length 
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