If c is velocity of light in vacuum and ...

If `c` is velocity of light in vacuum and `v` is the velocity of light in a medium of refractive index `mu`, then

`3 × 10^8 m/s`

`15 × 10^8 m/s`

`1.5 × 10^8 m/s`

`3 × 10^7m/s`

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Mock Test 33: PHYSICS
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