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Author Topic: Error In Transmittance  (Read 50 times)

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Error In Transmittance
« on: Today at 07:44:59 AM »


I am having trouble understanding error in transmittance. Here is  problem I am having trouble with:

A certain type of spectrophotometer exhibits one type of error which is constant with transmittance and which amounts to 0.25%T and a second type which is proportional to transmittance (relative error in T is constant) which amounts to 0.20%.

(a) At what value of transmittance will the relative error in concentration be a minimum? (Ans: 0.341)
(b) What is the realtive error in concentration at this point? (Ans: 0.71%)
(c) Between what values of T will the relative error in concentration be equal to or less than 1.0% (Ans. 0.18-0.647)

I know there are equations to use for this but I don't have a reference book that has these equations. I am also not really clear on the difference between the two types of error.  ::)Any clarification would be very much appreciated. Thank you!


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