Photoelectric Activity Research Articles

The photo-electric fatigue of zinc. —II

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 = K 1 e -λ 1 t + K 2 e -λ 2 t . 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 λ 1 = 0.141 and λ 2 = 0.00737; K 1 and K 2 were of the same order of magnitude.

Effect of Absorbed Hydrogen and of Other Gases on the Photo-Electric Activity of Metals

Effect of Absorbed Hydrogen and of Other Gases on the Photo-Electric Activity of Metals