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RP Photonics Encyclopedia - Open access photonics encyclopedia with in-depth information, free articles, lasers, nonlinear and fiber optics
rp-photonics.com/encyclopedia.
(formerly the Encyclopedia of Laser Physics and Technology) is a large scientifically founded encyclopedia on optics and photonics, provided by RP Photonics.

Toroidal ring model - Wikipedia
en.m.wikipedia.org/wiki/Toroid
The toroidal ring model, known originally as the Parson magneton or magnetic electron, is a physical model of subatomic particles. It is also known as the plasmoid ring, vortex ring, or helicon ring. This physical model treated electrons and protons as elementary particles, and was first proposed by Alfred Lauck Parson in 1915.

Lev Landau - Scientist of the Day - Linda Hall Library
lindahall.org/lev-landau/
In addition to his award-winning work in , he is also remembered for a scale he devised to rank 20th-century physicists. It was an exponential scale, according to which 0 was the highest possible (indeed infinite) score, followed by 1 through 5, and because the scale was logarithmic, a “1” was considered 10 times more productive than a “2”, and a “2” ten times better than a “3”. was a “1”, as were Niels and Paul and several others. was given the highest rank, a “0.5”, which made him about three times smarter, or at least more productive, than Newton and Bohr. initially ranked himself as a “2.5”, but later decided that he really deserved to be a “2” and moved himself up the scale.

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