In a photoelectric effect experiment, photons whose energy is 4.73 × 10-19 J are absorbed by a metal, and the maximum kinetic energy of the resulting electrons is Ekinetic = 2.78 × 10-19 J. Calculate: (a) the binding energy of electrons in the metal. (b) the wavelength of the light. (c) the wavelength of the electrons.

In a photoelectric effect experiment, photons whose energy is 4.73 × 10-19 J are absorbed by a metal, and the maximum kinetic energy of the resulting electrons is Ekinetic = 2.78 × 10-19 J. Calculate: (a) the binding energy of electrons in the metal. (b) the wavelength of the light. (c) the wavelength of the electrons.

Modern Physics

3rd Edition

ISBN:9781111794378

Author:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Publisher:Raymond A. Serway, Clement J. Moses, Curt A. Moyer

Chapter3: The Quantum Theroy Of Light

Section: Chapter Questions

Problem 16P

See similar textbooks

Similar questions

The work function for potassium is 2.26 eV. What is the cutoff frequency when this metal is used as photoelectrode? What is the stopping potential when for the emitted electrons when this photo electrode is exposed to radiation of frequency 1200 THz?
What is the de Brogue wavelength of a proton whose kinetic energy is 2.0 MeV? 10.0 MeV?
A 600-nm light falls on a photoelectric surface and electrons with the maximum kinetic energy of 0.17 eV are emitted. Determine (a) the work function and (b) the cutoff frequency of the surface. (c) What is the stopping potential when the surface is illuminated with light of wavelength 400 nm?
What is the maximum kinetic energy of photoelectrons ejected from sodium by the incident radiation of wavelength 450 nm?
A photon of energy 5.0 keV collides with a stationary electron and is scattered at an angle of 60°. What is the energy acquired by the electron in the collision?
Suppose that in the photoelectric-effect experiment we make a plot of the detected current versus the applied potential difference. What information do we obtain from such a plot? Can we determine from it the value of Planck’s constant? Can we determine the work function of the metal?
If the work function of a metal is 3.2 eV, what is the maximum wavelength that a photon can have to eject a photoelectron from this metal surface?
Show that Stefan’s law results from Planck’s radiation law. Hin: To compute the total power of blackbody radiation emitted across the entire spectrum of wavelengths at a given temperature, integrate Planck’s law over the entire spectrum P(T)=0I(,T)d. Use the substitution x=hckT and the tabulated value of the integral 0dx x 3( e x 1)=415
In the interpretation of the photoelectric effect, how is it known that an electron does not absorb more than one photon?
The work function of a photoelectric surface is 2.00 eV. What is the maximum speed of the photoelectrons emitted from this surface when a 450-nm light falls on it?
What is the de Brogue wavelength of an electron that is accelerated from rest through a potential difference of 20 keV?
What is the wavelength of (a) a 12-keV X-ray photon; (b) a 2.O-MeV y -ray photon?