Question

On heating a liquid, the refractive index generally_____________.

Answer 1

Here we will first know what does refractive index mean, its formula and then we will know how is refractive index related to heating of a liquid.The refractive index is the ratio of light speed in a vacuum to light speed in a specific medium.

Complete answer:
Refractive index is also known as a refraction index or refraction index. The speed of light in a medium is influenced by its properties. The optical density of the medium determines the speed of electromagnetic waves. The propensity of atoms in a substance to recover absorbed electromagnetic energy is known as optical density. The slower the speed of light is, the more optically dense the material is. The refractive index is one such measure of a medium's optical density.

The refractive index is a one-dimensional quantity. It's a number that shows how much slower a light wave will travel through a substance than it would in a vacuum. The refractive index, denoted by the symbol $n$, is the difference between the velocity of light in vacuum and the velocity of light in a medium.
The refractive index formula is as follows:
$n=c/v$
Where, $n$ is the refractive index, $c$ is the velocity of light in a vacuum ( $3\times {{10}^{8}}\,m/s$) and $v$ is the velocity of light in respective medium.

The space between the molecules increases slightly as the density of the liquid decreases with heating. As a result, as the temperature of the liquid rises, the refractive index of the liquid decreases. We know that the denser a medium is, the slower the speed of light in that medium would be.

Note: When the temperature increases in a liquid, its density increases. Its refractive index also increases and this is due to decrease in the distance between molecules.Refractive index is also referred to as refraction index or index of refraction. The speed of light in a medium depends on the properties of the medium.