Question

The speed of light in vaccum is 3×10^8ms-¹and the speed of light in water 2.25×10^8 ms-¹ find refractive index of water.

Answer 1

The speed of light in vaccum = 3×10^8m/s
The speed of light in water = 2.25×10^8 m/s
refractive index of water
= speed of light in vaccum
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Speed of light in water

= (3×10^8 m/s) /(225×10^6m/s)
= 300 / 225
= 4/3
Hope this helps u Mr. Chahal.....
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Answer 2

Answer:

1.33

Explanation:

Given :

Speed of light in water = 2.25 × 10⁸ m / sec

We have

Speed of light in air = 3 × 10⁸ m / sec.

We know :

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

Putting value we get :

Refractive index = 3 × 10⁸ m / sec / 2.25 × 10⁸ m / sec

Refractive index = 1.33

Hence Refractive index is 1.33 .