Essential University Physics (3rd Edition)
Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
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Chapter 35, Problem 61PP
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If a qdot’s size is decreased, what happened to the wavelength of the photon that emitted in a transition from the dot’s first excited state to the ground state.

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An electron is excited from the ground state of an atom (energy level 1) into a highly excited state (energy level 8).  Which of the following electron behaviors represents the fluorescence effect by the atom?  a. The electron remains at level 8 for a very long time, then transitions up to level 9.  b. The electron transitions directly down from level 8 to level 1.  c. The electron transitions from level 8 to level 1 and then returns quickly to level 8.  d. The electron transitions from level 8 to level 6, then to level 5, then to level 3, then to level 1.
3.a. By using the de Broglie relation, derive the Bohr condition mvr = nh. 3.b.Use this expression to show that the allowed electron energy states in Hydrogen atom can be written mk? e En 2k² r? 3.c.Find the wavelength of photon that is emitted when the electron in a Hydrogen atom undergoes a transition from n=3 to n=1.
Tutorial Sheet 01 1. In the Bohr model for a hydrogen atom, an electron revolving in the third excited state. If the electron drops into second state, calculate the following: a. The total energy of the electron in the third excited state. b. The transition energy. c. The kinetic energy of electron in first excited state. 2. Prove that the total energy of electron is measured in units of jou CREDHA 3. Hydrogen atom electron moves from third orbit to the first orbit, calculate the wave number of the radiated light. (Repeat using Rydberg equation). 4. Calculate the radius of orbit of an electron moving around a hydrogen atom with an energy of -13.6ev. If a photon of energy 10.2ev hits electron and losses all its energy to the electron, calculate the new radius of orbit. What frequency of light will be emitted if the above electron changes it orbital radius to its old value? 5. An electron at rest light of wavelength 4.96*10-7m. Calculate the velocity of the electron. 6. An single…
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