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The mercury lamp produces about 30 W of outgoing light, and the fraction striking the photodiode...

The mercury lamp produces about 30 W of outgoing light, and the fraction striking the photodiode is about 0.05% in the Violet2 line (violet2 = 404.6 nm for wavelength). The capacitance of the capacitor inside the detector is 10 uF, and it takes about one second to charge it to approximately 2 V.

By using the formula Energy/time = Nphhf, where Nph is the number of photons per second, find the rate at which photons strike the photodetector when the violet2 line is detected.

Science   Advanced-Physics   
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