Speed of light in water is 2.25×10^8m/s. What is the refractive index

1.	Speed of light in water is 2.25×10^8m/s. What is the refractive index of water?
Answer» QUESTIONThe speed of light in water is 2.25 × 108\xa0m/s. If the speed of light in vacuum be 3 × 108\xa0m/s, calculate the refractive index of water.SOLUTIONGiven:Speed of light in water = 2.25 × 108\xa0m/sSpeed of light in vacuum = 3 × 108\xa0m/sRefractive index of water = ?Applying the formula for refractive index, we get:\u200bRefractive index of a medium = (Speed of light in vacuum) / (Speed of light in the medium)For water:Refractive index of water = (Speed of light in vacuum) / (Speed of light in water)= (3 × 108) / (2.25 × 108)= 1.33Thus, the refractive index of water is 1.33.

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