In a certain liquid, the velocity of light is found to be 2.50×108 ms−1. Find the absolute refractive index of that liquid.
The correct option is B 1.2
Speed of light in liquid, vl=2.5×108 m/s
Let nl be refractive index of liquid wrt vacuum.
Speed of light in vacuum is c=3×108 m/s
From definition of refractive index,