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The refractive index of water is (4//...

The refractive index of water is `(4//3)` and that of glass is `(3//2)` . If the speed of light in glass is `2xx 10^(8) m//s` . The speed of light in water will be:

A

`2.67xx10^(8)` m/s

B

`2.25xx10^(8)` m/s

C

`1.78xx10^(8)` m/s

D

`1.50xx10^(8)` m/s

Text Solution

Verified by Experts

The correct Answer is:
B
`"As",""_(a)mu_(g)=(V_a)/(V_g)`
`implies3/2=(V_a)/(2xx10^(8))`
`V_(a)=3xx10^(8)m//s`
`4/3=(3xx10^(8))/(V_(w))`
`V_(w)=9/4xx10^(8)=2.25xx10^(8)`
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