Inquiry into Physics
Inquiry into Physics
8th Edition
ISBN: 9781337515863
Author: Ostdiek
Publisher: Cengage
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Chapter 10, Problem 10P
To determine

(a)

Angular momentum of the ball.

To determine

(b)

Approximate value of the quantum number.

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(a) Using Bohr’s second postulate of quantization of orbital angular momentum show that the circumference of the electron in the n,h orbital state in hydrogen atom is n times the de-Broglie wavelength associated with it. (b) The electron in hydrogen atom is initially in the third excited state. What is the maximum number of spectral lines which can be emitted when it finally moves to the ground state?
(a) What is the wavelength of light for the least energetic photon emitted in the Balmer series of the hydrogen atom spectrum lines? (b) What is the wavelength of the series limit?
(a) Explain why the Bohr model of the atom violates the Heisenberg Uncertainty Principle. (b) A photon is emitted by a doubly ionised lithium atom (Li2+) when an electron makes a transition to the ground state. The wavelength of the photon is measured to be 10.83 nanometres. Determine the principal quantum number and the energy of the initial stat The atomic number of lithium is Z = 3. (c) i. Photons of wavelength 10.83 nanometres are incident on a tantalum surface. What is the maximum kinetic energy of the photoelectrons if the work function of tan- talum is = 4.1 eV? ii. What is the maximum wavelength for a photon to eject photoelectrons from a tantalum surface? ■

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