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Home Q & A Board Laboratory Help Introductory Courses
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mickey16 mickey16
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11 years ago
I know to find absorbance the equation is absorbance= 2=log%T.

But, how do I solve THIS equation?
   %T= ?  

(basically I forgot how to take the inverse log or whatever)
Sorry, that first equation should be:
    Absorbance= 2-log%T  



I'm looking for this equation to find %transmittance of light values for a spectrophotometer.
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wrote...
#1
11 years ago
if absorbance = 2-log(%T), log(%T) = 2 - absorbance
If the log in the equation is base-10, then
%T = 10^(2 - absorbance)
Your formula seems to agree with the ref, which quotes the Beer-Lambert Law as:
(decadic) absorbance = -log10(T) which would = 2-log10(%T)
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