Physics for Scientists and Engineers, Vol. 1
Physics for Scientists and Engineers, Vol. 1
6th Edition
ISBN: 9781429201322
Author: Paul A. Tipler, Gene Mosca
Publisher: Macmillan Higher Education
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Chapter 34, Problem 59P
To determine

The minimum energy of the electron.

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Scanning and tunneling electron microscopes are used to measure high resolution scientific images. As a general rule, the wavelength of the electrons must be at least as small as the item being scanned in order to detect/image the presence of the item. The new novel coronavirus has a size of 60 nm to 140 nm. The crowns or "corona" which are the protien like structures that extend from the body of the virus and have a length of 7 nm to 10 nm. The image above was taken at Rocky Mountain Laboratories in Montana, USA, using a tunneling electron microscope (TEM). What approximate size of wavelength was used to produce the image? 160 nm O 80 nm O 20 nm O 5 nm оооо
A principle of resolution of objects is that the position can only be determined to an accuracy approximately the same as the wavelength being used. What is the resulting uncertainty in an electron velocity if we attempt to use optical radiation with λ = 500 nm to determine its position?
If an electron’s position can be measured to a precisionof 2.4 x 10-8 m how precisely can its speed be known?
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