Wavelengths of light

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Light is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes.

In this article, we’ll look closer at the different colors of the visible light spectrum that most of us are fortunate enough to see. At first glance, color and advanced math seem to be miles apart…

Spectroscopy is the investigation and measurement of spectra produced by matter interacting with or emitting electromagnetic radiation.

Wavelengths of light: Each hue in the visible spectrum has a corresponding wavelength measured in nanometers, which are only one billionth of a meter. Hue differences are tiny measurement differences between the crests of each wavelength. Red has the longest wavelength and violet the shortest.

Learn about the dispersion of light, the electromagnetic spectrum, and how sunlight contains a range of wavelengths (photons of differing energy) with this video segment from Shedding Light on Science. Isaac Newton investigated sunlight by shining it through a glass prism; after the prism refracted the light, he saw a spectrum of colors. He recognized that sunlight was made up of many colors, which could not be further separated when passed through a second prism. Drops of water in the air…

By using a prism. See explanation. If a visible light goes through a prism it different wavelengths (i.e. different colours) go out at different angles, so you can see all colours in the light that went in the prism.

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TJ. Rayleigh scattering refers to the scattering of light off of the molecules of the air, and can be extended to scattering from particles up to about a tenth of the wavelength of the light.