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The easiest way would be to find a descriptive article on the internet that shows

the visible colors spread out with some wavelengths labeled. There, you can find

the approximate wavelengths for light of various colors.

If you don't know the color of the light, then in order to find its wavelength,

you'd need to know either its frequency or the energy of a photon (quantum).

Energy of a photon = h f

h = Planck's Konstant = about 6.63 x 10-34 joule-second

f = frequency of the light wave or photon

But the frequency is (speed of light)/(wavelength)

so, Energy = h c/wavelength .

If you know either the energy of the photon or its frequency, you can use

this stuff to find its wavelength.

In this discussion, I've toggled back and forth a few times between the frequency/wavelength

of the quantum and the frequency/wavelength of the light wave. Don't worry. They're

the same.

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11y ago

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