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Find out how the fine-structure constant, which describes how light interacts with matter, may not be constant after all--it may have changed its value over billions of years. Learn how light from distant quasars provides information about the fine-structure constant.
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![]() <a href="https://www.compadre.org/informal/items/detail.cfm?ID=548">Physics Central. Physics in Action: The Little Constant that Couldn't?. College Park: American Physical Society, January 15, 2002.</a>
![]() Physics Central, (American Physical Society, College Park, 2002), WWW Document, (http://www.physicscentral.org/explore/action/constant.cfm).
![]() Physics Central, Physics in Action: The Little Constant that Couldn't? (American Physical Society, College Park, 2002), <http://www.physicscentral.org/explore/action/constant.cfm>.
![]() Physics Central. (2002, January 15). Physics in Action: The Little Constant that Couldn't?. Retrieved February 7, 2025, from American Physical Society: http://www.physicscentral.org/explore/action/constant.cfm
![]() Physics Central. Physics in Action: The Little Constant that Couldn't?. College Park: American Physical Society, January 15, 2002. http://www.physicscentral.org/explore/action/constant.cfm (accessed 7 February 2025).
![]() Physics Central. Physics in Action: The Little Constant that Couldn't?. College Park: American Physical Society, 2002. 15 Jan. 2002. 7 Feb. 2025 <http://www.physicscentral.org/explore/action/constant.cfm>.
![]() @misc{
Author = "Physics Central",
Title = {Physics in Action: The Little Constant that Couldn't?},
Publisher = {American Physical Society},
Volume = {2025},
Number = {7 February 2025},
Month = {January 15, 2002},
Year = {2002}
}
![]() %Q Physics Central %T Physics in Action: The Little Constant that Couldn't? %D January 15, 2002 %I American Physical Society %C College Park %U http://www.physicscentral.org/explore/action/constant.cfm %O text/html ![]() %0 Electronic Source %A Physics Central, %D January 15, 2002 %T Physics in Action: The Little Constant that Couldn't? %I American Physical Society %V 2025 %N 7 February 2025 %8 January 15, 2002 %9 text/html %U http://www.physicscentral.org/explore/action/constant.cfm 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
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