Question

The seven-colored lights of the spectrum can be recombined when two prisms are placed in

Answer 1

Seven colored Spectrum and Prism:

1. Seven-colored Spectrum: It refers to the fraction of the electromagnetic spectrum that can be seen with the naked eye.
2. Prism: It is a light-refracting transparent optical device having flat, polished surfaces. It disperses the light passing from it.

Explanation:

1. A prism disperses the light passing through it.
2. Prism work on the principle of dispersion of light.
3. If two prisms are aligned parallel to each other with one prism inverted then white light is passed.
4. Then the light enters the first prism, it disperses into seven different colors as shown in the figure below. This phenomenon is known as dispersion of light.
5. When the scattered light passes through the inverted prism, the seven different colors recombine to form a single white light as illustrated in the figure below. This phenomenon is known as the spectrum of light recombination.
6. Different wavelenght of light makes the seven-color spectrum and when this spectrum is passed through an inverted prism, these different wavelengths recombine into one to form a beam of white light.
7. During the recombination of spectrum, the second prism is placed parllel to the base of the first prism and inverted to the first prism at the same height.