Question

What is the speed of light in a block of glass that has an index of refraction of 1.58?

Answer 1

189742.06 km/s

Explanation:

Given:

n = the index of refraction = 1.58

To find the speed of light in a medium, we use the following formula:

`\begin{gathered} v=(c)/(n) \\ \\ \text{ where c is the speed of light in a vacuum, c = 29979.458 kilometers per second } \\ \\ \text{ We replacing:} \\ \\ v=(299792.458)/(1.58) \\ \\ v=189742.06\text{ km/s} \end{gathered}`

The speed of light in a block of glass 189742.06 kilometers per second