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White light is made up of the complete light spectrum. If you shine white light thru a crystal prism you will see the rainbow colors.
Red light will dissipate only because it is the only color that is there.
John, the opposite is true. The wavelenght is proportional to the frequency, in other words the longer the wavelength the lower the frequency. Higher frequencies (shorter wavelenghts) dissipate quickly in the water because the energy is absorbed by the water molecules. The longer wavellengths or lower frequencies do not dissipate in the water, that is why submarines use low frequencies.
Hi Steve and welcome aboard.
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