The Table Lists the Index of Refraction for Various Substances

Multiple Choice

The table lists the index of refraction for various substances at 20 °C for light with a wavelength of 589 nm in a vacuum. Through which substance will light with a vacuum wavelength of 589 nm travel with the greatest speed?

A) fused quartz
B) crown glass
C) ethyl alcohol
D) carbon tetrachloride
E) crystalline quartz