Question

the speed of light in water is 2.25 into 10 power 8 metre per second and in the vacuum it is 3 into 10 power 8 metre per second calculate the refractive index of water

Answer 1

Answer:

Refractive index of water will be 0.75  

Explanation:

We have given that speed of light in water $=2.25\times 10^8m/sec$

And speed of light in vacuum is = $3\times 10^8m/sec$

We have to find the refractive index

We know that refractive index is given by ratio of the speed light in medium to the speed of light in vacuum, here medium is water

So refractive index $n=\frac{2.25\times 10^8}{3\times 10^8}=0.75$

So refractive index of water will be 0.75  

Answer 2

Explanation:

answer is 1.333

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