Question

The refractive index of water is 1.33 and the speed of light is 3 × 100000000ms calculate the speed of light in water

Answer 1

Hi there!
Here's the answer :

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Refractive Index = $\frac{c}{c_{med}}$

Given,
Refractive Index = $1.33$
medium = water


Let $c_{med}=x$


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$1.33$ = \frac{3×10^{8}}{x}[/tex]


$x$ = \frac{3×10^{8}}{1.33}[/tex]

=> $x = 2.26×10^{8}\: m/s$



•°• Speed of light in water $= 2.26×10^{8}\: m/s$


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Answer 2

Answer:

2.25 × 10⁸ m / sec

Explanation:

Given :

Refractive index of water = 1.33

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

We know :

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

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

Putting value we get :

Speed of light in water = 3 × 10⁸ m / sec / 1.33 .

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

Hence speed of light in water is 2.25 × 10⁸ m / sec