written by
Gary Gladding
published by
the University of llinois Physics Education Research Group
This interactive homework problem shows a coherent beam of photons incident on a double slit. Students are asked to duplicate the interference/diffraction pattern of photons using electrons instead. The slit width, space between slits, and distance to screen are all given in the problem. Finally, students must determine the kinetic energy of one of the electrons.
This problem is accompanied by a Socratic-dialog "help" sequence designed to encourage critical thinking as users do a guided conceptual analysis before attempting the mathematics. It is part of a larger collection of interactive problems developed by the Illinois Physics Education Research Group.
<a href="https://www.compadre.org/introphys/items/detail.cfm?ID=6478">Gladding, Gary. Illinois PER Interactive Examples: A Tale of Two Particles. Urbana: University of llinois Physics Education Research Group, June 16, 2006.</a>
G. Gladding, (University of llinois Physics Education Research Group, Urbana, 2002), WWW Document, (https://per.physics.illinois.edu/per/IE/ie.pl?phys102/ie/12/particles).
G. Gladding, Illinois PER Interactive Examples: A Tale of Two Particles (University of llinois Physics Education Research Group, Urbana, 2002), <https://per.physics.illinois.edu/per/IE/ie.pl?phys102/ie/12/particles>.
Gladding, G. (2006, June 16). Illinois PER Interactive Examples: A Tale of Two Particles. Retrieved February 10, 2025, from University of llinois Physics Education Research Group: https://per.physics.illinois.edu/per/IE/ie.pl?phys102/ie/12/particles
Gladding, Gary. Illinois PER Interactive Examples: A Tale of Two Particles. Urbana: University of llinois Physics Education Research Group, June 16, 2006. https://per.physics.illinois.edu/per/IE/ie.pl?phys102/ie/12/particles (accessed 10 February 2025).
Gladding, Gary. Illinois PER Interactive Examples: A Tale of Two Particles. Urbana: University of llinois Physics Education Research Group, 2002. 16 June 2006. 10 Feb. 2025 <https://per.physics.illinois.edu/per/IE/ie.pl?phys102/ie/12/particles>.
@misc{
Author = "Gary Gladding",
Title = {Illinois PER Interactive Examples: A Tale of Two Particles},
Publisher = {University of llinois Physics Education Research Group},
Volume = {2025},
Number = {10 February 2025},
Month = {June 16, 2006},
Year = {2002}
}
%A Gary Gladding %T Illinois PER Interactive Examples: A Tale of Two Particles %D June 16, 2006 %I University of llinois Physics Education Research Group %C Urbana %U https://per.physics.illinois.edu/per/IE/ie.pl?phys102/ie/12/particles %O text/html
%0 Electronic Source %A Gladding, Gary %D June 16, 2006 %T Illinois PER Interactive Examples: A Tale of Two Particles %I University of llinois Physics Education Research Group %V 2025 %N 10 February 2025 %8 June 16, 2006 %9 text/html %U https://per.physics.illinois.edu/per/IE/ie.pl?phys102/ie/12/particles
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This is a link to the full collection of interactive homework problems by the same author. Complete problem sets are available for both algebra-based and calculus-based courses in introductory physics.
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