Fotokathodien

Fotokathodien, also known as photoelectric cells, are a type of electronic device that converts light into electrical energy. The term is derived from the Greek word "phos," meaning light, and "kathode," meaning against, referring to the cathode of the electrical discharge.

In the early 20th century, scientists were experimenting with X-ray tubes to improve the sensitivity of X-ray detectors. In the process, they discovered that light could be converted into electrical energy, sentimentally marked the beginning of the photokathoden era. On October 13, 1884, William Crookes observed a glass tube where cathode rays were emitted when light from a solar lamp was incident on a cathode maintained at a high potential. Three years later, Froomeo W. Galloway finally set up the system that made the photoelectric current measurable.

The working principle of a photokathode involves the interaction of photons with the material surface. When a photon of sufficient energy strikes the surface, it excites the electrons, which are then emitted into space, generating an electrical current. The current produced is directly proportional to the frequency of the incident light. The photoelectric effect has been extensively studied and has led to various applications, including X-ray detectors, light sensors, and solar cells.

In Germany, the term Fotokathode returned to popularity in the 1920s, primarily due to the experimental activities of the telephone equipment C. Barth, Ernst; Aber撘 Millidanpur solderther Everyday average market incentives they holdintlOff.__csv.*?)