Planck's law Updated 2025-07-16
Used to explain the black-body radiation experiment.
Published as: On the Theory of the Energy Distribution Law of the Normal Spectrum by Max Planck (1900).
The Quantum Story by Jim Baggott (2011) page 9 mentions that Planck apparently immediately recognized that Planck constant was a new fundamental physical constant, and could have potential applications in the definition of the system of units (TODO where was that published):This was a visionary insight, and was finally realized in the 2019 redefinition of the SI base units.
Planck wrote that the constants offered: 'the possibility of establishing units of length, mass, time and temperature which are independent of specific bodies or materials and which necessarily maintain their meaning for all time and for all civilizations, even those which are extraterrestrial and nonhuman, constants which therefore can be called "fundamental physical units of measurement".'
TODO how can it be derived from theoretical principles alone? There is one derivation at; en.wikipedia.org/wiki/Planck%27s_law#Derivation but it does not seem to mention the Schrödinger equation at all.
Black-body radiation experiment Updated 2025-07-16
- The Quantum Story by Jim Baggott (2011) page 10 mentions:and the footnote comments:
Early examples of such cavities included rather expensive closed cylinders made from porcelain and platinum.
- 1859-60 Gustav Kirchhoff demonstrated that the ratio of emitted to absorbed energy depends only on the frequency of the radiation and the temperature inside the cavity
- 1896 Wien approximation seems to explain existing curves well
- 1900 expriments by Otto Lummer and Ernst Pringsheim show Wien approximation is bad for lower frequencies
- 1900-10-07 Heinrich Rubens visits Planck in Planck's villa in the Berlin suburb of Grünewald and informs him about new experimental he and Ferdinand Kurlbaum obtained, still showing that Wien approximation is bad
- 1900 Planck's law matches Lummer and Pringsheim's experiments well. Planck forced to make the "desperate" postulate that energy is exchanged in quantized lumps. Not clear that light itself is quantized however, he thinks it might be something to do with allowed vibration modes of the atoms of the cavity rather.
- 1900 Rayleigh-Jeans law derived from classical first principles matches Planck's law for low frequencies, but diverges at higher frequencies.
Black-body Radiation Experiment by sciencesolution (2008)
Source. A modern version of the experiment with a PASCO scientific EX-9920 setup. Ultraviolet catastrophe Updated 2025-07-16
What is the Ultraviolet Catastrophe? by Physics Explained (2020)
Source. Bitcoin non-standard transaction Updated 2025-07-16
Bibliography:Monday, January 29, 2024
- bitcoin.stackexchange.com/questions/5883/is-there-a-listing-of-strange-or-unusual-scripts-found-in-transactions/105392#105392
- bitcoin.stackexchange.com/questions/547/useful-alternative-bitcoin-transaction-scripts
- bitcoin.stackexchange.com/questions/35956/non-standard-tx-with-obscure-op-codes-examples/36037#36037 notably provides the amazing www.quantabytes.com/articles/a-survey-of-bitcoin-transaction-types
Base58 Updated 2025-07-16
Base64 Updated 2025-07-16
yEnc Updated 2025-07-16
Big O notation Updated 2025-07-16
Little-o notation Updated 2025-07-16
Stronger version of the big O notation, basically means that ratio goes to zero. In big O notation, the ratio does not need to go to zero.
Fourier-Bessel series Updated 2025-07-16
Completeness: math.stackexchange.com/questions/2192665/is-this-set-of-bessel-functions-a-basis-for-all-c10-a-functions TODO
This is the Bessel function analogue to Fourier basis is complete for .
Loopholes in Bell test experiments Updated 2025-07-16
BB86 vs E91 Updated 2025-07-16
Positive-strand RNA virus Updated 2025-07-16
Audacity profile-based background noise removal Updated 2025-07-16
ASM International Updated 2025-07-16
Parent/predecessor of ASML.
Artificial chromosome Updated 2025-07-16
Using de novo DNA synthesis to synthesize entire Chromosomes.
Allen Wu Updated 2025-07-16
This situation is the most bizarre thing ever. The dude was fired in 2020, but he refused to be fired, and because he has the company seal, they can't fire him. He is still going to the office as of 2022. It makes one wonder what are the true political causes for this situation. A big warning sign to all companies tring to setup joint ventures in China!
ARM Fired ARM China’s CEO But He Won’t Go by Asianometry (2021)
Source. Arm product Updated 2025-07-16
Twelve Apostles Updated 2025-07-16
Apostle not in the Twelve Updated 2025-07-16
There are unlisted articles, also show them or only show them.