Topic: photoelectric effect

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photoelectric effect

The Columbia Encyclopedia, Sixth Edition
photoelectric effect emission of electrons by substances, especially metals, when light falls on their surfaces. The effect was discovered by H. R. Hertz in 1887. The failure of the classical theory of electromagnetic radiation to explain it helped lead to the development of the quantum theory . According to classical theory, when light, thought to be composed of waves, strikes substances, the energy of the liberated electrons ought to be proportional to the intensity of light. Experiments showed that, although the electron current produced depends upon the intensity of the light, the max... Read more
photoelectric cell
The Columbia Encyclopedia, Sixth Edition photoelectric cell or photocell, device whose electrical ... emits electrons in accordance with the photoelectric effect . Although the phototube itself is ... human eye. The photovoltaic type of photoelectric cell, when exposed to light, can generate ... electric eyes. Author not available, ... Read more
Millikan, Robert A. 1868-1953
American Decades ... charge of the electron and the photoelectric effect, work essentially completed ... the value of e until 1917. Photoelectric Effect Millikan's next project was ... mathematical explanation for the photoelectric effect (1905), whereby light knocks ... Read more

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plank's constant photoelectric effect