The work function (binding energy) is the energy that must be supplied to cause the release of an electron from a photoelectric material. The corresponding photon frequency is the threshold frequency. The higher the energy of the incident light, the more kinetic energy the electrons have in moving away from the surface. The work function for cesium (used in IR lamps) is equivalent to 202.6 kJ/mol photons. Use this information to calculate the energy, wavelength, and velocity of ejected electrons. What is the kinetic energy, in Joules, of each ejected electron when light of 250.0 nm strikes the metal surface?
The work function (binding energy) is the energy that must be supplied to cause the release of an electron from a photoelectric material. The corresponding photon frequency is the threshold frequency. The higher the energy of the incident light, the more kinetic energy the electrons have in moving away from the surface. The work function for cesium (used in IR lamps) is equivalent to 202.6 kJ/mol photons. Use this information to calculate the energy, wavelength, and velocity of ejected electrons. What is the kinetic energy, in Joules, of each ejected electron when light of 250.0 nm strikes the metal surface?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:The work function (binding energy) is the energy that must be supplied
to cause the release of an electron from a photoelectric material. The
corresponding photon frequency is the threshold frequency. The
higher the energy of the incident light, the more kinetic energy the
electrons have in moving away from the surface. The work function for
cesium (used in IR lamps) is equivalent to 202.6 kJ/mol photons. Use
this information to calculate the energy, wavelength, and velocity of
ejected electrons.
What is the kinetic energy, in Joules, of each ejected electron when
light of 250.0 nm strikes the metal surface?
4
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