Question

Light enters from air to water. Its speed in water becomes 2.25 x 108 m/s. Find the refractive index of water. (speed of light in air = 3 x 108 m/s) ​

Answer 1

Answer:

The speed of light in water is 2.25 x 108 m/s. If the speed of light in vacuum be 3 x 108m/s, calculate the refractive index of water.

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Answer 2

Speed of light in vacuum = 3.0 x 108m/s

Speed of light in water = 2.25 x 108m/s

Refractive index of water = ?

We know that

Refractive index of water = speed of light in vacuum/speed of light in water

Refractive index of water = 3 x 108/2.25 x 108 = 1.33

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