Abstract :
Although the present amazing variety of applications of the photoelectric cell has been developed entirely during the past decade, the photoelectric effect was discovered during the nineteenth century. This article gives a brief account of the fundamental laws of photoelectric phenomena and their theoretical significance; it is the eighth of a series of special articles prepared under sponsorship of the A.I.E.E. committee on education, for full details of which see p. 238 of the February issue.
