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|  | | Energy to no. photons
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|  | | |  The number of photons of a particular wavelength in a given energy is calculated by use of the equation for photon energy, E = hc/λ (where h is Planck's constant).
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| | |  For reference, the wavelength of ultraviolet light is in the range 100-400 nm, visible light is in the range 400-800 nm, and infrared light is in the range of 800 nm - 10 microns and beyond. The units menu allows you to choose, for example, to quote the number of photons in moles in the case that it is more convenient. | | ||||||
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© Andy & Steve Shipway 2008