-1) The mass of a proton is 1.67×10-27 kg and the mass of an electron is 9.11x10-31 kg. A cal car has a mass of ~1000 kg. (a) Find the de Broglie wavelength (in nm) of a proton with a kinetic energy of 2.50 eV. (b) Find the de Broglie wavelength (in nm) of a 2.50 eV electron. (c) Estimate the de Broglie wavelength of a car driving down the highway. You can round to the nearest oder of magnitude. (d) In general, what can we conclude about the de Broglie wavelengths of macroscopic objects? Are the wave qualities of macroscopic objects noticeable?

-1) The mass of a proton is 1.67×10-27 kg and the mass of an electron is 9.11x10-31 kg. A cal car has a mass of ~1000 kg. (a) Find the de Broglie wavelength (in nm) of a proton with a kinetic energy of 2.50 eV. (b) Find the de Broglie wavelength (in nm) of a 2.50 eV electron. (c) Estimate the de Broglie wavelength of a car driving down the highway. You can round to the nearest oder of magnitude. (d) In general, what can we conclude about the de Broglie wavelengths of macroscopic objects? Are the wave qualities of macroscopic objects noticeable?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter27: Quantum Theory

Section: Chapter Questions

Problem 58A

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Question

(dB-1) The mass of a proton is 1.67x10-27 kg and the mass of an electron is 9.11×10-31 kg. A
typical car has a mass of ~1000 kg.
(a) Find the de Broglie wavelength (in nm) of a proton with a kinetic energy of 2.50 eV.
(b) Find the de Broglie wavelength (in nm) of a 2.50 eV electron.
(c) Estimate the de Broglie wavelength of a car driving down the highway. You can
round to the nearest oder of magnitude.
(d) In general, what can we conclude about the de Broglie wavelengths of macroscopic
objects? Are the wave qualities of macroscopic objects noticeable?

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