light travels through water at a speed of 2.25×10^8m/s.find the refractive index of water.(c=3×10^8)
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Refractive index of a material is a dimensionless number that describes how light propagates through a medium.
Refractive index, n = c/v
Where n is refractive index, c is the speed of light and v is phase velocity of light in the medium.
The refractive index of water, n = 1.33
This implies 1.33 = 2.99 x 10 ^8/v
Therefore, v = 2.25 x 10^8 metres per second
I hope this information helps you.
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