Question

If the light from the laser diode passes through a cuvette with a solution of concentration 10 mg/dL. The laser light emerging out of the cuvette has a brightness of about 20 Lux and falls on the detector CdS photoconductive cell GL5528, such that the resistance of the detector reads about 5 kOhm.

Now, if the light from the laser diode passes through the same cuvette with a solution of unknown concentration. The laser light emerging out of the cuvette falls on the detector CdS photoconductive cell GL5528, such that the resistance of the detector reads about 50 kOhm.

Calculate the unknown concentration (in mg/dL).

Assume the absorbance is directly proportional to the resistance of the detector.

**Use GL5528 datasheet

Answer 1

evn. 여)detector 0く5 k.a lo "ng/札 ondl So Scanned with