⚛️ #OTD vor 90 Jahren kam Schrödingers Katze auf die Welt. Was hat es damit auf sich? Hören Sie sich die 15 Min. „Zeitzeichen“ von heute an. Gibt’s auch zum Anhören und Downloaden auf dieser Seite: www1.wdr.de/radio/wdr5/s...

⚛️ Nice rainbow yesterday. You can clearly see Alexander’s band, the darker region between the inner primary rainbow and the outer one.

Physics stories ⚛️ Nernst as a singer Walther Nernst once had the honor of presenting a radio broadcast to the German Emperor and Empress. Nernst operated the transmitter at the Physics Institute. For the broadcast, he had selected a recording of a song sung by the famous tenor Enrico Caruso. 1/2

Including a chapter about Lucy Mensing, forgotten pioneer of Quantum Mechanics, by Michel Janssen and myself. In 1925 she made the first application of the newly formulated matrix mechanics to molecules, contributing significantly to its acceptance.

I guess I should have figured this would happen, but seeing all these articles claiming Heisenberg "discovered" quantum mechanics on Helgoland in June 1925 makes me want to throw up. For the true story, check out my April 2025 piece in @physicstoday.bsky.social! pubs.aip.org/physicstoday...

Er ist studierter Mathematiker. Da wäre doch „Pius der 3,14te“ sehr passend.

⚛️ Compact history of early Quantum Mechanics info.aps.org/e/640833/um-...

Wir feiern 2025 das 100-jährige Jubiläum der #Quantenphysik. Der Fachbereich #Physik lädt aus diesem Anlass zur Vortragsreihe „Physik zur Mittagszeit“ ein. Dabei gibt es für die breite Öffentlichkeit verständliche und kurzweilige Einblicke in die Wissenschaft. Der Auftakt findet am 12. April statt.

⚛️ Pauli effect 3 (Find previous ones in my timeline.) One afternoon, in the late 1920s or early 1930s, a complicated apparatus exploded in the laboratory of physicist James Franck at the University of Göttingen. Franck reported the mishap to Pauli, who lived in Zurich, in a letter, 1/3

⚛️ Falls Sie nächsten Samstag mittag gerade in Münster sind: "Kleine Teilchen, Große Fragen: Die faszinierende Geschichte der Quantenphysik" www.uni-muenster.de/news/view.ph...

Gefährlich wird es, wenn die Dummen fleißig werden.

⚛️ Demythologizing quantum history „Celebrating the 100th anniversary of quantum mechanics in 2025 without providing appropriate context risks reinforcing a long legacy of hagiography and hero worship.“ pubs.aip.org/physicstoday...

„Die Professoren sind der Feind“, erklärte J.D. #Vance vor drei Jahren. Nicht nur die Wortwahl zeigt, dass Donald #Trump und seine Bande der #Wissenschaft den Krieg erklärt haben … Unser Herausgeber Kai Herfort hat in unserem Blog dazu folgende Meinung: www.laborjournal.de/blog/?p=14184

This Friday is #PiDay So, here is about the most efficient rational approximation for pi. It is known that the constant pi=3.141592653589... is irrational and therefore cannot be represented as a fraction. But it can be approximated with any precision using fractions p/q. 1/7

Lucy Mensing, vergessene Pionierin der Quantenmechanik ⚛️ #OTD wurde Lucy Mensing 1901 in Hamburg geboren. In den 1920er Jahren leistete sie fundamentale Beiträge zur neuen Quantenmechanik. Dennoch ist sie heute fast ganz vergessen. Was hat sie beigetragen und was führte zum Ende 1/9

Lucy Mensing, forgotten pioneer of quantum mechanics ⚛️ Lucy Mensing was born #OTD in Hamburg in 1901. In the 1920s she made fundamental contributions to the new quantum mechanics. Nevertheless, she is almost completely forgotten today. What did she contribute and what led 1/8

Physics stories ⚛️ Pauli, Dirac, and pieces of sugar I met Carl Friedrich von Weizsäcker several times. Once he told the following story. There was a meeting in Copenhagen, where Wolfgang Pauli, P.A.M. Dirac and others discussed physics. Pauli was drinking tea. 1/4

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Physics stories 137, Eddington and Pauli The strength of the electromagnetic interactions is characterized by a number alpha, "Sommerfeld's fine-structure constant". It's value is approximately 1/137. Accurate to 4 decimal places, its inverse is 137.036. This number 1/9

Physics stories ⚛️ Dirac, the large numbers, and two anecdotes The physicist Dirac, pioneer of quantum theory, discoverer of the Dirac equation and Nobel Prize winner, pointed out the following remarkable facts in 1937: 1/10

When I met Einstein

I forgot the physics tag, here it is: ⚛️

"Negative time" in quantum physics? In the fall of 2024, a physics experiment hit the headlines. News portals such as London Daily News, NDTV, The Independent, Science Alert and others reported on the discovery of “negative time”, 1/11

What is this? Strange attractor? Poincare map? Vortex turbulence?

Physics stories ⚛️ Pauli lecturing In one of his lectures, Pauli said of an assertion: "That's trivial". A student remarked: "I don't really understand why that's trivial." Pauli then left the lecture hall without saying a word. When he hadn't returned after five minutes, 1/2

Physics stories ⚛️ Pauli effect 2 Once, Wolfgang Pauli, Pascual Jordan and Rudolph Minkowski wanted to take the S-Bahn to Hamburg-Bergedorf together to meet the astronomer Otto Heckmann at the observatory. At Hamburg-Dammtor station, Jordan threw coins into the ticket machine, but 1/2

Physics stories ⚛️ Pauli effect 1 Wolfgang Pauli is known, among other things, for the Pauli principle, for which he was awarded the Nobel Prize in 1945. He was proud of the Pauli effect: when he was in or near a laboratory, experiments often failed or equipment broke down. 1/3

Am meisten interessieren mich der Riemann-Tensor und der Energie-Impuls-Tensor.

Auf in den Süden, zu Hunderten!

Lucy Mensing, forgotten pioneer of quantum mechanics #Physics #Quantum physics ⚛️🧪 You have studied quantum mechanics but never heard of Lucy Mensing? In the 1920s she gave pioneering contributions to quantum theory, but has nearly been forgotten in science. 1/2

Hi Physgal, @physgal.bsky.social please add me to the Physics list. orcid.org/0000-0002-18... www.uni-muenster.de/Physik.TP/~m...

Determinism and quantum theory #Physics #Quantum_physics ⚛️ 🧪 @physgal.bsky.social Does determinism hold, i.e. is everything predetermined according to laws? This question has always been discussed in connection with quantum theory. Would it perhaps be possible in principle to decide 1/13

So, jetzt hab ich mein X-Account endgültig stillgelegt. 😜

#Physik #Quantenphysik Determinismus und Quantentheorie Gilt der Determinismus, also dass alles gesetzmäßig vorherbestimmt ist? Diese Frage ist immer auch im Zusammenhang mit der Quantentheorie diskutiert worden. 1/14

Neue Posts laden Ich bin ja neu hier, und hatte mich gewundert, dass auch nach einem halben Tag keine neuen Posts im Feed "Following" auftauchten. Wie aktualisiert man einen Feed? Herunterziehem der oberen Kante, wie ehemals auf X, half nicht auf meinem iPhone. In den Anleitungen und

Herzlich willkommen auf meinem Bluesky Account. Ab und zu gibt’s hier was zu Physik, Physik-Geschichte, Mathematik, Wissenschaftstheorie und Anderem.

Möchten Sie Quantenmechanik lernen und scheuen keine Formeln? Eines meiner Bücher: