A few more example problems
on quantum/atomic physics. I should be able to post some more tomorrow evening, but these are highly relevant for the exam.
General Physics II,
University of Alabama
Dr. LeClair
Posted by
pleclair
at
1:59 AM
"The views, opinions, and conclusions expressed in this page are those of the author or organization and not necessarily those of The University of Alabama or its officers and trustees. The content of this page has not been reviewed or approved by the University of Alabama, and the author or organization is solely responsible for its content."
Unless otherwise noted, © Copyright 2007-2012 by Patrick R. LeClair.
This material may be distributed only subject to the terms and conditions set forward in the Open Publication License, v1.0 or later (the latest version is
presently available at:
http://www.opencontent.org/openpub/
Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. Distribution of the work or derivative of the work in any standard (paper) book form is prohibited unless prior permission is obtained from the copyright holder.
8 comments:
Can you post solutions to the Sum 09 Aug 5 hw9?
Will there be any questions on the uncertainty principle or binding energy?
Do we need to know the difference between converging lens and diverging lens.? As in the different problems of those?
1) There are many requests for solutions to old problems. I'll be perfectly honest, I'm tied up until at least 6pm tonight. It won't happen until then, and I'm not sure I can do it for all the requests. I'll see what I can do.
2) No.
3) Yes, you'll need to know the characteristics of converging and diverging lenses - what sorts of images form at what distances relative to the focal length, etc.
Will there be any questions involving prisms about angular dispersion of the visible light?
No prisms or angular dispersion.
For #3 how did you get the final answers? I did hc/E to solve for the wavelengths and didn't get the right answer.
For #4 The question asks for wavelengths but the answers are just changes in energy. Would that be the final answer or would we need to solve for the wavelengths using those Es?
Thank you!
#3 - watch the units, if the energy is in eV, you'll need to convert it to J or use Planck's constant in eV*s instead of J.s. Also the wavelength units, nm=1e-9. A handy relationship is that hc=1240eV*nm, so if you want wavelengths in nm and have energies in eV, you can just do (lambda) = 1240/(energy in eV).
#4 - exactly, I found the energy differences, which is just an intermediate step. The wavelengths (which would be the final answer) you'd get like above: (lambda in nm) = 1240/(energy diff in eV).
Post a Comment