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The refractive index of glass W.t.r. a m...

The refractive index of glass W.t.r. a medium is `4/3` . If `v_m - vg = 6.25 xx 10^(7)`m/s. then the velocity of light in the medium will be

A

`2.5 xx 10^(8)` m/s

B

`1.5 xx 10^(7)` m/s

C

`2.25 xx 10^(8)` m/s

D

`4.5 xx 10^(7)`m/s

Text Solution

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The correct Answer is:
A
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