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__that is used so that starting from this two equations:__

**the whole mathematical path****A = 2 - log**and

_{10}%T**A = [tex]\epsilon[/tex]bc**,

where:

**A**is absorbance, ( no units )

**T**is transmittance, ( no units )

**[tex]\epsilon[/tex]**is molar absorbtivity, ( L mol

^{-1}cm

^{-1})

**b**is the length of the sample ( path length of the cuvette ) ( cm ) and

**c**is the concentration of the compound in solution ( mol L

^{-1})

the equation

**%T = e**is deduced.

^{-[tex]\epsilon[/tex]bc}note: the molar absorbtivity is represented by

__the letter epsilon__from the Greek alphabet and

__it's not superscripted__as it looks like.

Thanks in advance