Question

What is the speed of light in quartz (n=1.54)? Will light travel faster or slower through ruby (n = 1.76) than quartz?

Answer 1

Step-by-step explanation:

V=C/n

Quartz: (3×10^8)/(1.54)=1.948×10^8 m/s

The higher the index of refraction the slower light will travel, so light will be slower in ruby.