The number of waves in a glass plate of thickness 4 cm is same as in 5 cm of vertical column of water of refractive index 4/3, then refractive index of glass will be
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a
5/3
b
5/4
c
16/14
d
1.5
answer is A.
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Detailed Solution
wave no. =1λ for 1 cm thickness4λg=5λw45=λgλw=μwμg=4/3μ9μg=53