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written by
Gary Gladding
published by the University of llinois Physics Education Research Group
This is an interactive homework problem on the topic of light reflection. Three mirrors are arranged so that light hits the first mirror at an incident angle 62°. With the information given, the user is asked to find the angle at which light leaves the final mirror. The solution can be found by using plane geometry and the Law of Reflection.
The 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.
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Record Link
<a href="https://www.compadre.org/portal/items/detail.cfm?ID=6465">Gladding, Gary. Illinois PER Interactive Examples: Three Mirrors. Urbana: University of llinois Physics Education Research Group, September 22, 2006.</a>
AIP Format
G. Gladding, (University of llinois Physics Education Research Group, Urbana, 2002), WWW Document, (https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/08/01).
AJP/PRST-PER
G. Gladding, Illinois PER Interactive Examples: Three Mirrors (University of llinois Physics Education Research Group, Urbana, 2002), <https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/08/01>.
APA Format
Gladding, G. (2006, September 22). Illinois PER Interactive Examples: Three Mirrors. Retrieved May 1, 2025, from University of llinois Physics Education Research Group: https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/08/01
Chicago Format
Gladding, Gary. Illinois PER Interactive Examples: Three Mirrors. Urbana: University of llinois Physics Education Research Group, September 22, 2006. https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/08/01 (accessed 1 May 2025).
MLA Format
Gladding, Gary. Illinois PER Interactive Examples: Three Mirrors. Urbana: University of llinois Physics Education Research Group, 2002. 22 Sep. 2006. 1 May 2025 <https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/08/01>.
BibTeX Export Format
@misc{
Author = "Gary Gladding",
Title = {Illinois PER Interactive Examples: Three Mirrors},
Publisher = {University of llinois Physics Education Research Group},
Volume = {2025},
Number = {1 May 2025},
Month = {September 22, 2006},
Year = {2002}
}
Refer Export Format
%A Gary Gladding %T Illinois PER Interactive Examples: Three Mirrors %D September 22, 2006 %I University of llinois Physics Education Research Group %C Urbana %U https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/08/01 %O text/html
EndNote Export Format
%0 Electronic Source %A Gladding, Gary %D September 22, 2006 %T Illinois PER Interactive Examples: Three Mirrors %I University of llinois Physics Education Research Group %V 2025 %N 1 May 2025 %8 September 22, 2006 %9 text/html %U https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/08/01 Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.
Citation Source Information
The AIP Style presented is based on information from the AIP Style Manual. The APA Style presented is based on information from APA Style.org: Electronic References. The Chicago Style presented is based on information from Examples of Chicago-Style Documentation. The MLA Style presented is based on information from the MLA FAQ. Illinois PER Interactive Examples: Three Mirrors:
Covers the Same Topic As
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