(a) The surface of a metal is illuminated with light of wavelength 590nm. A PD of 0.15V is applied between the metal surface and the collecting electrodes in order to prevent the collection of electrons. Calculate: (i) The work function of the metal. (ii.) The work done against the most energetic photoelectrons. (iii.) The speed of the most energetic electrons. (b.) Light of varying frequencies is incident on the surface of three different metals x, y and z. The work functions wo of the metals are such that w0x < w0y < w0z. Sketch on the same axes graphs to show how the maximum kinetic energies of photoelectrons vary with frequency.
(a) The surface of a metal is illuminated with light of wavelength 590nm. A PD of 0.15V is applied between the metal surface and the collecting electrodes in order to prevent the collection of electrons. Calculate: (i) The work function of the metal. (ii.) The work done against the most energetic photoelectrons. (iii.) The speed of the most energetic electrons. (b.) Light of varying frequencies is incident on the surface of three different metals x, y and z. The work functions wo of the metals are such that w0x < w0y < w0z. Sketch on the same axes graphs to show how the maximum kinetic energies of photoelectrons vary with frequency.
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter6: The Periodic Table And Atomic Structure
Section: Chapter Questions
Problem 6.101PAE: 6.101 Laser welding is a technique in which a tightly focused laser beam is used to deposit enough...
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(a) The surface of a metal is illuminated with light of wavelength 590nm. A PD of 0.15V is applied between the metal surface and the collecting electrodes in order to prevent the collection of electrons. Calculate:
(i) The work function of the metal.
(ii.) The work done against the most energetic photoelectrons.
(iii.) The speed of the most energetic electrons.
(b.) Light of varying frequencies is incident on the surface of three different metals x, y and z. The work functions wo of the metals are such that w0x < w0y < w0z. Sketch on the same axes graphs to show how the maximum kinetic energies of photoelectrons vary with frequency.
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