Question

calculate speed of light in water if speed of light in vaccum is 3×10^8.the value of refractive index of water is 4/3.​

Answer 1

Answer:

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The refractive index of water = Speed of light in air / Speed of light in water

Given :

Refractive Index = 4 / 3

Speed of light in air = 3 * 10⁸ m/s

We have to find Speed of light in water.

Substituting the values in the formula for refractive index :

refractive index of water = Speed of light in air / Speed of light in water

4 / 3 = 3 * 10⁸ / Speed of light in water

Speed of light in water =  3 * 10⁸ * 3 / 4

Speed of light in water = 2.25 * 10⁸

Thus,

Speed of light in water is 2.25 * 10⁸ m/s

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Answer 2

Answer:

μ = c/v  

v =   c/μ =  (3x10^8/4) *3 = 2.25 * 10^8m/sec

Explanation: