Question

Optical density of a medium is directly proportional to its mass density.

• A. True
• B. False

Answer 1

The correct option is B False

The above statement is false. Mass density of a material is given by ratio of its mass to volume. Whereas the optical density of a medium is determined by the speed of light in that medium. Speed of light is inversely proportional to the optical density of a medium. Refractive index is the measure of optical density. Ex; Kerosene has less mass density than water but more optical density than water.