Explain the experiment of measuring the real and apparent expansion of a liquid with a neat diagram.

Explanation

(i) To start with the liquid whose real and apparent expansion is to be determined is poured in a container up to a level. Mark this level as `L_(1)`.
(ii) Now, heat the container and the liquid using a burner as shown in the figure Initially, the container receives the thermal energy and it expands.
As a result, the volume of the liquid appears to have reduced. Mark this reduced level of liquid as `L_(2)`

On further heating, the thermal energy supplied to the liquid through the container results in the expansion of the liquid. Hence, the level of liquid rises to `L_(3)`. Now, the difference between the levels `L_(1) and L_(3)` called as apparent expansion, and the difference between the levels `L(2) and L_(3)` is called real expansion. The real expansion is always more than that of apparent expansion
Real expansion = `L_(1)-L_(2)`
Apparent expansion `=L_(2)-L_(1)`