Question

Pls answer this correctly according to class 10​

Answer 1

Answer:

Optical density is related to light speed . The medium in which speed of light is more is considered as rarer medium. The medium in which speed of light is less is considered as denser medium.

Example:Let us consider a pair of media : Air and water

Light travels with greater speed in air and with less speed in water. Hence air is called as rarer medium and water as denser media.

mass density is related to heaviness or lightness of an object.

Mass density=Mass of object/ Volume of object

example: let us consider two objects iron and cotton with 1kg. We know that cotton occupies more space than iron hence density of cotton is less than iron.

So iron is more heavier than cotton.

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