Fundamentals of Physics, Volume 1, Chapter 1-20
10th Edition
ISBN: 9781118233764
Author: David Halliday
Publisher: WILEY
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Chapter 38, Problem 24P
To determine
To find:
a) A value for the Planck constant.
b) The work function for sodium.
c) The cut off frequency for
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In a photoelectric experiment using a sodium surface, you find a stopping potential of 1.86 V for a wavelength of 300 nm and a
stopping potential of 0.885 V for a wavelength of 393 nm. From these data find (a) a value for the Planck constant, (b) the work
function for sodium, and (c) the cutoff wavelength Ao for sodium.
(a) Number i
(b) Number i
(c) Number i
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In a photoelectric experiment using a sodium surface, you find a stopping potential of 1.85 V for a wavelength of 300 nm and a stopping potential of 0.820 V for a wavelength of 400 nm. From these data find (a) a value for the Planck constant, (b) the work function Φ for sodium, and (c) the cutoff wavelength λ0 for sodium.
In a photoelectric experiment using a sodium surface, you find a stopping potential of 1.73 V for a wavelength of 310 nm and a
stopping potential of 0.740 V for a wavelength of 412 nm. From these data find (a) a value for the Planck constant, (b) the work
function for sodium, and (c) the cutoff wavelength o for sodium.
Chapter 38 Solutions
Fundamentals of Physics, Volume 1, Chapter 1-20
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- 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?arrow_forwardThe 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?arrow_forwardA 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?arrow_forward
- What is the de Brogue wavelength of a proton whose kinetic energy is 2.0 MeV? 10.0 MeV?arrow_forwardIf 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?arrow_forwardWhat is the maximum kinetic energy of photoelectrons ejected from sodium by the incident radiation of wavelength 450 nm?arrow_forward
- At what velocity will an electron have a wavelength of 1.00 m?arrow_forwardExplain how you can determine the work function from a plot of the stopping potential versus the frequency of the incident radiation in a photoelectric effect experiment. Can you determine the value of Planck’s constant from this plot?arrow_forwardLight of wavelength 350 nm falls on a potas- sium surface, and the photoelectrons have a maximum kinetic energy of 1.3 eV. What is the work function of potassium? The speed of light is 3 × 10° m/s and Planck's J.s. -34 constant is 6.63 × 10° Answer in units of eV. What is the threshold frequency for potas- sium? Answer in units of Hz.arrow_forward
- Light of wavelength 350 nm falls on a potassium surface, and the photoelectrons have amaximum kinetic energy of 1.3 eV.What is the work function of potassium?The speed of light is 3 × 108 m/s and Planck’sconstant is 6.63 × 10−34 J · s.Answer in units of eV. What is the threshold frequency for potassium?Answer in units of Hz.arrow_forwardFor a particular cathode material in a photoelectric-effect experiment, you measure stopping potentials V0 = 1.0 V for light of wavelength l = 600 nm, 2.0 V for 400 nm, and 3.0 V for 300 nm. Determine the work function f for this material and the implied value of Planck’s constant h.arrow_forwardIn a photoelectric experiment using a Potasium surface, you find a stopping potential of 0.57 V for a wavelength of 434 nm and a stopping potential of 2.30 V for a wavelength of 271 nm. Because this is an experiment, your value of Planck's constant will be slightly different from the official value. From these data find a) a value for Planck's constant h 8.81 x10-34 J . s b) the work function for Potasium 2.29 eV c) the cutoff wavelength for this metal 541.5 птarrow_forward
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