The absolute refractive index of water is 1.36. What is the velocity of light in water? (velocity of light in vacuum 3 x108 m/s).


We have, Velocity of light in vacuum (V1) = 3 x108 and n= 1.36

Now, suppose n = V1 / V2

Then, 1.36 = (3 x108) / V2

Therefore, V2= (3 x108) / 1.36

Thus, V= 2.21×108 m/s.

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