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lysets absorptionskoefficient k beregnes efter formlen Ø= Ø0 7 e-kl,
the light absorption coefficient k is calculated by means of the formula Ø = Ø0 7 e-kl, where l is the effective length of the passage of light beams through the gas being measured, Ø0 is the flow of light in and Ø is the flow of light out.