In spectroscopy, there are two ways of expressing the amount of light absorbed by the analyte; transmittance, or absorbance. Differentiate these two terms. Which of the two is directly proportional to concentration and can be used for quantitative analysis?
1) Transmittance is the amount of light that passes through the sample, while absorbance is the amount of light that is absorbed by the sample.
2) Transmittance is directly proportional to concentration and can be used for quantitative analysis.
3) Absorbance is directly proportional to concentration and can be used for quantitative analysis.
4) Both transmittance and absorbance are directly proportional to concentration and can be used for quantitative analysis.
