Question

What is the recombination of the spectrum of white light ?

Answer 1

Here in order to answer the question we will clear our concepts of basic optics given by Sir Isaac Newton in detail which is related to the spectrum of white light.Dispersion is the breaking of white light into its constituent colours. Light deviates as it moves through a prism.

Complete answer:
The angle of deviation is determined by the angle of incidence, the prism angle, the colour of the light, and the prism material, i.e. the refractive index of the prism material. As white light passes through a prism, it creates a band of seven colours known as the spectrum. Violet, indigo, blue, green, yellow, orange, and red are the seven colours of the spectrum. As light of various colours passes through a prism, it is refracted at different angles, resulting in a spectrum.

The dispersion of light by water decreases in the atmosphere creating a rainbow. A rainbow often appears in the opposite direction of the sun. As light reaches a water droplet, it is refracted and scattered into its constituent colours, then fully internally mirrored at the water-air interface and emerges from the drop, creating a rainbow.

Sir Isaac Newton was the first to achieve the spectrum of sunlight using a glass prism. Newton used a similar prism to further split the colours of the white light spectrum. He couldn't get any more colours, though. He then reversed the direction of a second equivalent prism in relation to the first prism.

Many of the colours of the spectrum were able to move into the second prism as a result. A ray of white light emerged from the other side of the second prism, which he discovered. This discovery led Newton to the conclusion that the sun has seven colours. White light is a term used to describe any light that has a spectrum close to that of sunlight.

Note: Performed the following experiment: take two prisms and rotated the second prism with respect to the first prism, then passed a narrow beam of white light through the first prism, the light dispersed, and by slightly changing the second prism, we got white light emanating from the second prism. This is known as recombination of white light spectrum.