Question

A light with a speed of 2.25 x 10^8 m/s in medium-A, and 2 x 10^8 m/s in medium- B. Which medium is optically denser?

Answer 1

☆ Speed of light is inversely proportional to optical density.
=> More the speed of light = less the optical density.

speed of light = 2.25 x 10^8 m/s in medium A.
speed of light = 2 x 10^8 m/s in medium B.

speed of light in medium B = 2 x 10^8 m/s so it is more optically denser.

Answer 2

More speed = less denser 
so the object b is denser as the speed of the object b is less and the speed of the object a is more .