If the Speed of Light Through an Unknown Liquid Is

Multiple Choice

If the speed of light through an unknown liquid is measured at 1.80 x 10⁸ m/s,what is the index of refraction of this liquid? (c = 3.00 x 10⁸ m/s)

A) 1.80
B) 1.67
C) 1.20
D) 0.600