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1. Starting from the law of conservation of total energy, show that Vstop= (KE)max/22. The energy density of electromagnetic radiation in some region of space is 3.2 × 10-8 J/m3. Assume that the radiation has a wavelength 610 nm. What is the photon density? 3.The maximum energy of photoelectrons from Al is 2.3 eV for radiation of 200 nm and 0.9 eV for radiation of 216 nm. Use these data to calculate the Planck’s constant and the work function of Al. 4. The threshold wavelength for the photoelectric effect in tungsten is 270 nm. Calculate the work function of tungsten, and calculate the maximum kinetic energy that a photoelectron can have when radiation of 120 nm falls on tungsten

1. Starting from the law of conservation of total energy, show that Vstop= (KE)max/22. The energy density of electromagnetic radiation in some region of space is 3.2 × 10-8 J/m3. Assume that the radiation has a wavelength 610 nm. What is the photon density? 3.The maximum energy of photoelectrons from Al is 2.3 eV for radiation of 200 nm and 0.9 eV for radiation of 216 nm. Use these data to calculate the Planck’s constant and the work function of Al. 4. The threshold wavelength for the photoelectric effect in tungsten is 270 nm. Calculate the work function of tungsten, and calculate the maximum kinetic energy that a photoelectron can have when radiation of 120 nm falls on tungsten

Modern Physics
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 43P
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1. Starting from the law of conservation of total energy, show that Vstop= (KE)max/2
2. The energy density of electromagnetic radiation in some region of space is 3.2 × 10-8 J/m3. Assume that the radiation has a wavelength 610 nm. What is the photon density?

3.The maximum energy of photoelectrons from Al is 2.3 eV for radiation of 200 nm and 0.9 eV for radiation of 216 nm. Use these data to calculate the Planck’s constant and the work function of Al.

4. The threshold wavelength for the photoelectric effect in tungsten is 270 nm. Calculate the work function of tungsten, and calculate the maximum kinetic energy that a photoelectron can have when radiation of 120 nm falls on tungsten

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