Question

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

Answer 1

ANSWER:

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

STEP-BY-STEP 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:

$s_{\text{ice}}=\frac{3\cdot10^8}{1.31}=2.29\cdot10^8\text{ m/s}$