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• wavelength to energy
• wavenumber
• WGM
• WMO

Wavelength to energy conversion formula:

Ep	= hv
	= hc / λ	(1)

where E_p is the photon energy, h is the Planck constant, c is the speed of light in vacuum, and λ is the wavelength of light in vacuum. In order to get the photon energy in eV, use this simplified and approximate conversion, resulting from the above equation:

Ep = 1241 / λ

(2)

with λ in nm.