Question

The index of refraction of ice is1.31. At what speed does lighttravel through ice? what’s the answer

Answer 1

`2.29\cdot10^8\text{ m/s}`

Explanation:

Light in a vacuum has the following speed

`s=3\cdot10^8\text{ m/s}`

Now, the speed of light through a material is equal to the speed in vacuum divided by the index of refraction. Therefore:

`s_{\text{ice}}=(3\cdot10^8)/(1.31)=2.29\cdot10^8\text{ m/s}`