Introduction to Prism

We must have seen the petrol spilled on the road during rainy days.

We can see the different layers of colours in that petrol

This happens due to the phenomenon of dispersion of light.

Splitting of white light into it's constituent colors is called as a dispersion of light.

Dispersion of light can be seen by using prism.

Let's learn about Prism

There exists an optical instrument that splits the white light into its composite colors.

This triangular piece of glass is known as which was discovered by Issac Newton in 1666.

Let us look at the different surfaces of the prism.

Prism is a refractive medium having five plane surfaces and a triangular cross-section along it's entire length.

Among the five planar surfaces, two of them, and are triangular.

While the remaining three and are rectangular surfaces.

Let us now introduce some terms related to prism.

In the figure, is referred to as and is called as .

and are called as light gets refracted through these surfaces .

Both these Refracting Surfaces coincide at which is called .

is known as the of the prism


Prism is a refractive medium which consists of five planar surfaces and has a triangular length cross-section.

Out of these surfaces, are rectangular and are triangular.


of the prism

The End