Dispersion of Light

Rainbow is a natural phenomenon that is formed due to the dispersion of light.

The wavelength of red light is _____.

List the three phenomena of light responsible for the formation of the rainbow in the sky.

Name the following:
Sometimes we see this after the rains ______.

Light is in the visible range of spectrum.

A prism ABC, with base BC, is placed in four different orientations as shown. A narrow beam of white light is incident on the prism as shown. In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?

Who discovered that light is composed of seven colours?

Which of the following colours of light beam bends least?

Which of the following is a valid relation?

(The symbols have their usual meaning)

Which of the following colours is not a part of the visible spectrum formed by dispersion of light?

During the dispersion of light, the least dispersed colour is :

The dispersion of light is the splitting of light into its component colours.

Which of the following colours is dispersed the least through a prism?

When a ray of light enters a prism from air, it :

An achromatic combination of lenses produces

Two beams of red and violet colors are made to pass separately through a prism (angle of the prism is $60°$). In the position of minimum deviation, the angle of refraction will be

A ray of light is incident on an equilateral glass prism placed on a horizontal table. For minimum deviation which of the following is true?


                 

The refractive index of glass is $1.520$ for red light and $1.525$ for blue light. Let $D_1$ and $D_2$ be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then