If the Speed of Light Through an Unknown Liquid Is

Multiple Choice

If the speed of light through an unknown liquid is measured at 2.42 × 10⁸ m/s,what is the index of refraction of this liquid? (c = 3.00 × 10⁸ m/s)

A) 0.81
B) 1.24
C) 1.54
D) 1.11
E) ​1.81