Question

What is Thermal Expansion? What are the types of thermal expansion. Explain​

Answer 1

$\bold{\purple{\text{Thermal expansion of a matter is the change in its volume}}}$

$\bold{\purple{\text{in response of a change in surrounding temperature.}}}$

$\bold{\purple{\text{In case of a solid body, this change can be also linear}}}$

$\bold{\purple{\text{and superficial, depending on overall dimensions of the}}}$

$\bold{\purple{\text{body. For example a change in length of a steel rod is }}}$

$\bold{\purple{\text{observed as its length is higher as compared to its other}}}$

$\bold{\purple{\text{dimensions.}}}$

$\bold{\color{lime}{\text{There are three types of thermal expansion.}}}$

• Linear expansion :- It is basically the increase in length of a material in relation to increase in temperature of material.

• Superficial expansion :- Whenever there is an increase n the area of solid body due to heating then the expansion is called superficial expansion.

• Cubical expansion:- Whenever there is an increase in the volume of the body due to heating the expansion is called as cubical or volumetric expansion.

Answer 2

Explanation:

Linear expansion :- It is basically the increase in length of a material in relation to increase in temperature of material.

Superficial expansion :- Whenever there is an increase n the area of solid body due to heating then the expansion is called superficial expansion.

Cubical expansion:- Whenever there is an increase in the volume of the body due to heating the expansion is called as cubical or volumetric expansion.