A point source of light is kept below the surface of water 
at a depth of 
. The radius of the circular bright patch of light noticed on the surface of water is ... 
.
A
B
3
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
: Here,
Refractive index of water, 
From figure,
Equating (i) and (ii), we get
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