Recent content by haushofer

Nothing. I'd say you did an excellent job. It's just that apparently you expected more from the results. How would you respond to someone who's e.g. doing athletics, trained hard, went to every training, was open to improvement and walked after all those years of hard work a marathon within 4...

In general: no. But in string theory it definitely is.

Not to discourage you, but Zwiebach is a very basic book on string theory, because it doesn't contain e.g. explicit conformal field theory, much differential geometry or group theory, and is extremely explicit in showing the steps in between. It is a fantastic book, but other string theory books...

Just out of interest (as an alumnus of the RUG): why not stick in Groningen, and do an applied physics master there?

It has been a while for me, but I also don't see what's wrong with it. Every vertex should contain two electron lines and one photon line. But I also haven't seen all of the 17 diagrams, so maybe one of them is topologically the same as the one you drew?

I merely regarded that statement that in the end one "interpretation" (theory) turns out to be the right one.

Perhaps not yet. But geocentric models with arbitrary epicycels also is arbitrarily empirically precise and equivalent to heliocentric models of our solar system. Of course, modern cosmology doesn't make sense from a geocentric point of view. We need a similar breaktrough for quantum mechanics...

Serendipity: looking for a needle in a haystack, but rolling out of the haystack with the farmer's daughter.

I have a feeling my question was not properly formulated. Let me rephrase it: How much surplus knowledge does a teacher need to be considered a good teacher? One reason I'm asking this is because in Dutch teacher's educations more and more time is spend on pedagogy and didactics, at the cost...

Dear all, as some of you may know I'm a math/physics teacher at a teachers education in Holland, where we prepare teachers at pre-university level high school. We focus mainly on teachers who are already licensed to teach in the first three years of pre-university high school ("2nd degree")...

I found this historical overview, https://www.jstor.org/stable/27757746 -never mind the request, I can read it online

Dear all, I'm writing an article about the didactics of teaching quantum physics, and in particular the phenomenon of resonant transmission, as discovered by Ramsauer and Townsend in 1920. The phenomenon was used in a Dutch physics exam in 2023, and in it the question states "To explain the...

It turns out that in certain limits the gravitational field acts similarly to an electromagnetic field and has a "magnetic component". The Newtonian theory of gravity you learn at high school resembles the "electric" part of that limit, so this may sound unfamiliar. See...

I don't think so, but I have to think about this a bit more. My gut reaction would be that this is similar to the question whether electrostatics with the Coulomb force can be recasted as spacetime curvature (since electric charge doesn't equal inertial mass), and I'm pretty sure it can't...

I don't see that clear distinction between "interactions" and "spacetime curvature"; Fierz-Pauli is an interactive description of GR, and Newton-Cartan theory describes Newtonian gravity as spacetime curvature.