The photo-electric fatigue of zinc. —II
Herbert Stanley Allen · Proceedings of the Royal Society of London Series A Containing Papers of a Mathematical and Physical Character · 1909
Abstract 1. Object and Method of the Experiments. In a former paper an account was given of the way in which the photoelectric activity of zinc diminishes when the metal is exposed to light from a Nernst lamp. It was shown that the photo-electric activity at a time t from the commencement of an experiment could be expressed by the formula I = K1e-λ1t + K2e-λ2t. In a typical experiment with a polished zinc plate the first exponential term fell to half value in 4.9 minutes, the second in 94 minutes, the constants of change being λ1 = 0.141 and λ2 = 0.00737; K1 and K2 were of the same order of magnitude.