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Tag Archive for: fine structure constant

hydrogen

Intro to the Ionization Energy of Atomic Hydrogen

November 21, 2019
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2 Comments
Introduction In previous articles relating to various transition energies in Hydrogen, Helium, and Deuterium we have employed the following formula for…
https://www.physicsforums.com/insights/wp-content/uploads/2019/11/hydrogen.png 135 240 Neil Parker https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Neil Parker2019-11-21 17:50:412024-09-02 09:25:38Intro to the Ionization Energy of Atomic Hydrogen
spacetime6

Struggles with the Continuum – Freeman Dyson and QED

February 12, 2016
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24 Comments
 Last time I sketched how physicists use quantum electrodynamics, or 'QED', to compute answers to physics problems as power series in the…
https://www.physicsforums.com/insights/wp-content/uploads/2016/02/spacetime6.png 135 240 John Baez https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png John Baez2016-02-12 15:36:012021-04-17 13:54:26Struggles with the Continuum – Freeman Dyson and QED
speedoflight

Why Does C Have a Particular Value, and Can It Change?

September 10, 2015
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53 Comments
Short answer: Because c (speed of light) has units, its value is what it is only because of our choice of units, and there is no meaningful way to test…
https://www.physicsforums.com/insights/wp-content/uploads/2015/09/speedoflight.png 135 240 bcrowell https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png bcrowell2015-09-10 15:58:412026-02-16 17:07:15Why Does C Have a Particular Value, and Can It Change?

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