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

Question

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

Quizplus · Accepted Answer

The Answer is C

The Table Lists the Index of Refraction for Various Substances