VIBGYOR.
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The previous answer is most unlikely. It would have been called the spectrum. The spectrum is a continuum of colours so there is no obvious reason for seven colours. It is believed that Newton actually noted 4 colours (and intermediate shades) and the 7 colours of the visible spectrum were introduced to align the number with the musical scale. The BIV division seems too artificial.
Furthermore, the British acronym is ROYGVIB so VIBGYOR is an unlikely name for Newton to have come up with.
A prism.
A prism will doToo generic a question. "Light" as we generally call it encompasses all the colors. You can however separate the frequencies of visible light with a simple prism.For a wider band of light outside the visual range you would need a spectrometer.
Is spectrum too simplistic an answer?
By Dispersion Of light (We call the phenomenon of spiliting of white light into 7 colours as dispersion of light.).......... You Can use Prism.....
refraction
It is called Visible light Spectrum.
By Dispersion Of light (We call the phenomenon of spiliting of white light into 7 colours as dispersion of light.).......... You Can use Prism.....
colors
By Dispersion Of light (We call the phenomenon of spiliting of white light into 7 colours as dispersion of light.).......... You Can use Prism.....
A "prism". Note: Prisms actually have five sides. There is no three-sided polyhedron.
When light traverse the interface between two transparent material with a different refraction index it undergo refraction, that is the angle of incidence on the interface is different from the angle with which the light comes out from the surface itself. In a prism refraction happens as the light passes from air to the prism material (generally glass or a polymer like PMMA, also called Plexiglas) and when the light leaves the prism, passing from it to air again. Since the difference of incident and emerging angles is opposite passing from air to prism and from prism to air (let us call that angle q) the total diffraction angle due to the passage through a prism is 2 q. Since q depends on the light wavelength (that is on the light color) different colors are diffracted at different angles and the light at the prism output appears as decomposed in different rays, exiting from the prism with different angles, one for each color. Doping the prism glass with impurities increasing a lot its refraction index, complete refraction can be obtained for selected light colors. These colors at the first interface with the prism have a refraction angle greater than 90° and light of those colors does not enter into the prism. Thus colors suffering total refractions lack from the prism output light.
White light can be split up into lots of different coloured light waves using a prism. We call this range of colours the visible spectrum.