Answered: Identical light beams (i.e. same…

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter9: Condensed Matter Physics

Section: Chapter Questions

Problem 66P: For a one-dimensional crystal, write the lattice spacing (a) in terms of the electron wavelength.

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Identical light beams (i.e. same intensity and wavelength) strike three different metals, all of which emit electrons.

Part A: Which metal results in the fastest ejected electrons?

A) Lead

B) Copper

C) Nickel

D) The maximum speed is the same for all metals

Part B: Which metal results in the least number of ejected electrons per second?

A) Copper

B) Nickel

C) Lead

D) The number of the ejected electrons is the same for all 3 metals

**Can you explain to me, in Part A, why Lead is the metal the results in the fastest ejected electrons? In Part B, why the number of ejected electrons is the same for all 3 metals? Thank you.

λ
λ
Сopper
O = 4.7 eV
Nickel
O = 5.2 eV
Lead
O = 4.3 eV

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