George M. Church Updated 2025-07-16
History of the atomic theory Updated 2025-07-16
In which roads is it OK to ride your bike based on car speed limits Updated 2025-07-16
Jacques Monod Updated 2025-07-16
Model of the atom Updated 2025-07-16
Parenteral nutrition Updated 2025-07-16
For some reason, this is one of the things that makes Ciro Santilli want to puke the most. More than surgery or blood.
Planet Updated 2025-07-16
Star Updated 2025-07-16
Synthetic biology Updated 2025-07-16
Bibliography:
Why do the electron and the proton have the same charge except for the opposite signs? Updated 2025-07-16
Given the view of the Standard Model where the electron and quarks are just completely separate matter fields, there is at first sight no clear theoretical requirement for that.
As mentioned e.g. at QED and the men who made it: Dyson, Feynman, Schwinger, and Tomonaga by Silvan Schweber (1994) chapter 1.6 "Hole theory", Dirac initially wanted to think of the holes in his hole theory as the protons, as a way to not have to postulate a new particle, the positron, and as a way to "explain" the proton in similar terms. Others however soon proposed arguments why the positron would need to have the same mass, and this idea had to be discarded.
Why gravity is not a force? Updated 2025-07-16
Astronomical unit Updated 2025-07-16
Ciro Santilli's hardware House 2018-01 Kitchen Updated 2025-07-16
Craig Venter Updated 2025-07-16
Early centralization is the source of much evil Updated 2025-07-16
Repeat this mantra:
Only decentralize when inevitable.
Only decentralize when inevitable.
Only decentralize when inevitable.
LinuxSynths Updated 2025-07-16
Lots of demos.
Periodic Videos Updated 2025-07-16
Proper motion Updated 2025-07-16
Victor Borge Updated 2025-07-16
Why is the spin of the electron half? Updated 2025-07-16
More interestingly, how is that implied by the Stern-Gerlach experiment?
physics.stackexchange.com/questions/266359/when-we-say-electron-spin-is-1-2-what-exactly-does-it-mean-1-2-of-what/266371#266371 suggests that half could either mean:
- at limit of large
lfor the Schrödinger equation solution for the hydrogen atom the difference between each angular momentum is twice that of the eletron's spin. Not very satisfactory. - it comes directly out of the Dirac equation. This is satisfactory. :-)
Unlisted articles are being shown, click here to show only listed articles.