A plane sound wave travelling with velocity 
in a medium 
reaches a point on the interface of medium 
and medium 
. If velocity of sound in medium 
is 
, the angle of incidence for total internal reflection of the wave will be greater than 
and 
)
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Let 
be angle of incidence and 
be the critical angle.
For total internal reflection,
Here, 
or 
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