Answers are grounded in this paper and cite their sources.
A new photo-electric cell is described which is composed of thallium, oxygen and sulphur. This cell shows maximum sensitiveness to light of wave-length about 10000 Angstrom units. Some of the best cells lower their dark resistance by fifty per cent. in.06 foot candles when the light source is a tungsten filament. The dark resistance of different cells may be from 5 megohms to 500 megohms. The induction and deduction periods of the cells are very small. The chief characteristics of the cell are mentioned.
No takes yet. Share an insight, caveat, or question.
Theodore W. Case (1920) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: