ANSWER:
189742.06 km/s
STEP-BY-STEP EXPLANATION:
Given:
n = the index of refraction = 1.58
To find the speed of light in a medium, we use the following formula:
[tex]\begin{gathered} v=\frac{c}{n} \\ \\ \text{ where c is the speed of light in a vacuum, c = 29979.458 kilometers per second } \\ \\ \text{ We replacing:} \\ \\ v=\frac{299792.458}{1.58} \\ \\ v=189742.06\text{ km/s} \end{gathered}[/tex]The speed of light in a block of glass 189742.06 kilometers per second
