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photoelectric constant

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  • Photoelectric efficiency — is described as the decrease in the photoelectric current as the frequency of electromagnetic radiation falling on a metal surface increases. As the frequency of the incident radiation increases with constant intensity, the number of photons in… …   Wikipedia

  • Constant voltage method — is a type of MPPT algorithm.[1] This method makes use of the fact that the ratio of maximum power point voltage and the open circuit voltage is 0.76.[2] It is the simplest MPPT control method.[3] Algorithm The operating point of the PV array is… …   Wikipedia

  • Photoelectric effect — The photoelectric effect is a quantum electronic phenomenon in which electrons are emitted from matter after the absorption of energy from electromagnetic radiation such as x rays or visible light.cite book | title = Physics for Scientists… …   Wikipedia

  • photoelectric effect — Physics. the phenomenon in which the absorption of electromagnetic radiation, as light, of sufficiently high frequency by a surface, usually metallic, induces the emission of electrons from the surface. Also called photoemission. [1890 95] * * *… …   Universalium

  • Photoelectric flame photometer — A photoelectric flame photometer is a device used in inorganic chemical analysis to determine the concentration of certain metal ions, among them sodium, potassium, lithium, and calcium.In principle, it is a controlled flame test with the… …   Wikipedia

  • Planck constant — Planck s relation redirects here. For the law governing black body radiation, see Planck s law. Values of h Units 6.62606957(29)×10−34 J·s[1] 4.135 …   Wikipedia

  • einstein's photoelectric equation — noun Usage: capitalized 1st E Etymology: after Albert Einstein : an equation in physics giving the kinetic energy of a photoelectron emitted from a metal as a result of the absorption of a radiation quantum: Ek=hν ω where Ek is the kinetic energy …   Useful english dictionary

  • Einstein's photoelectric equation — Physics. the equation that relates the energy of a photoelectron to the difference between the product of the frequency of the incident radiation times Planck s constant and the energy needed to remove the photoelectron from the substance. [named …   Universalium

  • radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium

  • Wave–particle duality — Quantum mechanics Uncertainty principle …   Wikipedia

  • electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium

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