photoelectric cell

Applications of Photoelectric Cells - Photocells are used in television camera to reproduce sound recorded on films, in counting devices, in burglar and fire alarms, to measure the temperature of stars, to study the spectrum of heavy bodies, to operate street light, to compare t..

Photocells are used in television camera to reproduce sound recorded on films, in counting devices, in burglar and fire alarms, to measure the temperature of stars, to study the spectrum of heavy bodies, to operate street light, to compare the illuminating powers of two sources, in photometer..

The essential parts of a fax system are the transmitting devices that translate the graphic material into electrical impulses according to a set pattern, and a synchronized receiving device that retranslates these impulses and prints that. In a typical system, the fax scanner consists of a rotating..

The phenomenon of interference, diffraction and polarization can be explained by the wave theory of light. But the photo electric effect can be explained only using 'photon theory'. That is using particle nature of light. The experimental study of photoelectric effect led to the c..

. In 1907, Korn sent the first inter-city fax when he transmitted a photograph from Munich to Berlin. This was perhaps the greatest boost the fax machine had faced so far, and soon many people would try to perfect the machine. In France, Edouard Beeline constructed the Belinograph. His invention in..