Open AccessThe photo-electric fatigue of zinc. —II
Author(s) -
H. S. Allen
Publication year - 1909
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1909.0017
Subject(s) - photoelectric effect , zinc , exponential function , nernst equation , metal , physics , optics , chemistry , atomic physics , mathematics , materials science , mathematical analysis , metallurgy , electrode , quantum mechanics
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 timet from the commencement of an experiment could be expressed by the formula I = K1 e -λ1 t + K2 e -λ2 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 λ1 = 0.141 and λ2 = 0.00737; K1 and K2 were of the same order of magnitude.