Question

The difference between the transmittance coefficients of the same substance measured in the same cuvette at different wavelengths is equal to 100 (T1/T2 ). How many times are the optical densities changed (D1-D2=1 ) ?.

Answer 1

$n=\log_{10}(100(T_1/T_2))=2+\log_{10}\frac {T_1}{T_2}.$