White light is emitted by the sun, it is composed of different colors visible or invisible to the human eye with different wavelengths and it travels at the speed of 300,000 km/s.
It is made up of a mixture of colors which are the colors of the rainbow that make up the spectrum of visible light.
To visualize all the colors contained in the white light, it is enough to make pass the white light through a prism, the light is then decomposed, it is the phenomenon of diffraction.
In a rainbow, it is the drops of water suspended in the atmosphere that break up the sunlight.
The human eye processes wavelengths from about 380 to about 750 nanometers.
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