Synonymer & Information om | Engelska ordet PHOTOELECTRIC

Exempel på hur man kan använda PHOTOELECTRIC i en mening

• The photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation such as ultraviolet light.
• Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities.
• The photocurrent may occur as a result of the photoelectric, photoemissive, or photovoltaic effect.
• Robert Andrews Millikan (March 22, 1868 – December 19, 1953) was an American experimental physicist who won the Nobel Prize for Physics in 1923 for the measurement of the elementary electric charge and for his work on the photoelectric effect.
• Cathodoluminescence is the inverse of the photoelectric effect, in which electron emission is induced by irradiation with photons.
• Researchers also used the photoelectric effect, involving a beam splitter, other quantum phenomena, and even the nuclear decay (due to practical considerations the latter, as well as the atmospheric noise, is not viable).
• Computers began to be used to observe and study massive amounts of astronomical data on stars, and new technologies such as the photoelectric photometer allowed astronomers to accurately measure the color and luminosity of stars, which allowed them to predict their temperature and mass.
• APDs use materials and a structure optimised for operating with high reverse bias, approaching the reverse breakdown voltage, such that charge carriers generated by the photoelectric effect are multiplied by an avalanche breakdown; thus they can be used to detect relatively small amounts of light.
• The operators used a telescopic sight and a joystick to guide the missile by radio control, which was detonated by acoustic and photoelectric proximity fuses, at.
• A photoelectric, or optical smoke detector, contains a source of infrared, visible, or ultraviolet light—typically an incandescent light bulb or light-emitting diode (LED)—a lens, and a photoelectric receiver—typically a photodiode.
• Other objects can be observed using CCD cameras or photoelectric photometers connected to a telescope, and the flux, or amount of light received, can be compared to a photometric-standard star to determine the exact brightness, or stellar magnitude, of the object.
• PMTs absorb the light emitted by the scintillator and re-emit it in the form of electrons via the photoelectric effect.
• Joel Stebbins became the Director in 1922, and the observatory became a focus for pioneering work on photoelectric photometry as well as the study of variable stars and the interstellar reddening of starlight.
• In the era of the old quantum theory, starting from Max Planck's proposal of quanta in his model of blackbody radiation (1900) and Albert Einstein's adaptation of the concept to explain the photoelectric effect (1905), and until Erwin Schrödinger published his eigenfunction equation in 1926, the concept behind quantum numbers developed based on atomic spectroscopy and theories from classical mechanics with extra ad hoc constraints.
• And in the 1950s and 1960s, he pioneered photoelectric photometry with a novel four-colour system, now called Strömgren photometric system.
• Optoelectronic streak cameras work by directing the light onto a photocathode, which when hit by photons produces electrons via the photoelectric effect.
• Photoemission spectroscopy (PES), also known as photoelectron spectroscopy, refers to energy measurement of electrons emitted from solids, gases or liquids by the photoelectric effect, in order to determine the binding energies of electrons in the substance.
• Joel Stebbins (July 30, 1878 – March 16, 1966) was an American astronomer who pioneered photoelectric photometry in astronomy.
• His paper referred to the work of other experimenters in the field, including Paul Gottlieb Nipkow and Porfiry Ivanovich Bakhmetiev, who were attempting to use the photoelectric properties of selenium as the basis for their research in the field of image transmission.
• Both types of device are varieties of solar cell, in that a photoelectrochemical cell's function is to use the photoelectric effect (or, very similarly, the photovoltaic effect) to convert electromagnetic radiation (typically sunlight) either directly into electrical power, or into something which can itself be easily used to produce electrical power (hydrogen, for example, can be burned to create electrical power, see photohydrogen).

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