a photometer with a linear response to radiation gave a reading of 595 mV with a bank in the light path and 139 mV when the blank was replaced by an absorbing solution. Calculate
a. the percent transmittance and absorbance of the absorbing solution
b. the expected transmittance if the concentration of the absorber is one half that of the original solution
c. the transmittance to be expected if the light path through the original solution