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Chemistry
Absorption coefficient units
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[QUOTE="mjc123, post: 6072549, member: 610180"] There is some inconsistency, but I think the general convention is that α is used for the natural log extinction coefficient, and ε for the decadic extinction coefficient: I[SUB]t[/SUB]/I[SUB]0[/SUB] = e[SUP]-αcl[/SUP] = 10[SUP]-εcl[/SUP] The usual units are L/mol/cm for both. If your paper was using remote sensing, then they should know the area being interrogated, but not the thickness. Then they would measure the amount of substance per unit area, which is equal to cl, hence the ML[SUP]-2[/SUP] units. If you don't know the actual concentration, you can't define an extinction length - it could be weak and thick, or strong and thin. [/QUOTE]
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Absorption coefficient units
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