Question

Kerosene having higher refractive index is optically dense although the mass density of kerosene is ……. than that of water. 

greater

less

greater than 1

can’t say

​

Answer 1

Answer:

less than the mass of water ...

that is why it will float on water not go down the water and form a layer over it not below it

Answer 2

The mass density of kerosene is (b) less than the mass density of water.

Although the refractive index of kerosene is higher than that of water, the mass density is less than water. The mass density does not always depend on the optical density or the refractive index of a material.

Mass density is constant for material and does not change if the quantity of the material is altered. It is an intensive property.

The optical density of a material is determined by the speed of light in the medium. The faster the light travels in a medium, the lesser the optical density and the lesser the refractive index. The Refractive index is also an intensive property.

Light travels faster in water than kerosene. So, the refractive index of water is lesser as compared to kerosene.