Answered: FIGURE 28.14 A double-slit interference…

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FIGURE 28.14 A double-slit interference pattern created with electrons.

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter4: Diffraction

Section: Chapter Questions

Problem 11CQ: The distance between atoms in a molecule is about 10-8 cm . Can visible light be used to “see”...

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Question

The electron interference pattern as shown was made by shooting electrons with 50 keV of kinetic energy through two slits spaced 1.0 mm apart. The fringes were recorded on a detector 1.0 m behind the slits.
a. What was the speed of the electrons? (The speed is large enough to justify using relativity, but for simplicity do this as a nonrelativistic calculation.)
b. Figure is greatly magnified. What was the actual spacing on the detector between adjacent bright fringes?

FIGURE 28.14 A double-slit interference
pattern created with electrons.

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