What is the greatest wavelength of light that will cause the emission of photoelectrons from sodium. If 200nm light falls on the sodium surface, what will be the greatest kinetic energy of photoelectrons (2.3 ev for sodium).
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What is the greatest wavelength of light that will cause the emission of photoelectrons from sodium. If 200nm light falls on the sodium surface, what will be the greatest kinetic energy of photoelectrons (2.3 ev for sodium).
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- The photoelectric threshold wavelength of a tungsten surface is given as 256 nm. Calculate the maximum kinetic energy of the electrons ejected by 1.47 x 1015 Hz frequency ultraviolet radiation from the tungsten surface. (Express your answer in terms of electron volts.)Photoelectric effect is observed on two metal surfaces. Light of wavelength 300.0 nm is incident on a metal that has a work function of 2.40 eV. What is the maximum speed of the emitted electrons? m/sWhen ultraviolet light with a wavelength of 400.0 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.10 eV. (a) What is the work function of the metal surface? (b) What is the maximum kinetic energy of the photoelectrons when light of wavelength 300.0 nm falls on the same surface?
- The mathematical equation for studying the photoelectric effect is hν = W + 1/2 meu2 where ν is the frequency of light shining on the metal; W is the energy needed to remove an electron from the metal; and me and u are the mass and speed of the ejected electron, respectively. In an experiment, a student found that a maximum wavelength of 351 nm is needed to just dislodge electrons from a metal surface. Calculate the velocity (in m/s) of an ejected electron when the student employed light with a wavelength of 283 nm.Lithium has a work function of 2.51 eV. What is the maximum kinetic energy of the photoelectrons if 9.7 x 10¹4 Hz radiation is incident upon it?Gold has a work function of 5.45 eV. What is the maximum kinetic energy of the photoelectrons if 9.7 x 10¹4 Hz radiation is incident upon it?
- UV radiation having a wavelength of 146 nm falls on gold metal, to which electrons are bound by 4.82 eV. What is the maximum velocity of the ejected photoelectrons? No need to use relativistic formulas in this case.Ultraviolet light with a single wavelength and with an intensity of 550 W/m² is incident normally on the surface of a metal that has a work function of 3.44 eV. Photoelectrons are emitted with a maximum speed of 420 km/s. Find the maximum possible rate of photoelectron emission from 1 cm² of the surface by imagining that every photon produces one photoelectron.