Recent content by MatthijsRog

Sounds like a great improvement! You’re right that the current sketch is not really comparable at all; it just shows the shape of some arbitrary geodesics. This shouldn’t be completely “wrong” but it could potentially confuse the viewer of such a sketch.

Thank you all very much for your comments. Thanks for the warning about the switch to 4D as well. I don’t think it’ll be massive impairment. Didactically, visualising lower-dimensional cases (working with projections, multivariable functions, etc) is usually a standard part of the roadmap to...

I’m working through the books by Schutz and Renteln to get my differential geometry to the point where I can do general relativity. The author’s have just introduced metrics and notions of parallel transport and with some work I finally understand how intrinsic curvature can be defined by...

You are completely right. Had I found that website, I would've known. However, since the practical will be taught for the first time, we have no real indication of whether things will "work". The first question I asked to prevent myself from wasting time--in the second post I explained that I...

Very clear answer, thank you very much for clarifying all those things! I had not taken the difference between the S.E. and the TISE into account. I believe I understand most of it, but I will read your reply again in one or two weeks when I've progressed a little further to make sure it sticks.

Sorry for the time delay, I must've missed the alerts. Still wanted to reply, though. The course I (help) teach is a course in experimental physics. Thus, showing videos is a little off limits. In general, I would always prefer letting students do a project on a subject (if time allows and it...

Hi, I'm an undergrad, following my very first serious course in QM. We're following Griffith's book, and so far we're staying close to the text in terms of course structure. Griffiths starts out his book by postulating that each and every state for any system \Psi must be a solution to the...

Thanks for the help! I did a quick experiment yesterdat with a speaker outputting a fixed-frequency sine in front of a hollow open-ended cylinder with a moveable endpiece. The speaker was set up about two centimetres before the tube, and the whole thing resonated like an open-open cylinder...

Dear all, For my students, I'm currently trying out some experiments they can do to simulate acoustic processes. One of the topics that we will be discussing is that of standing waves. Although I have never done it before--I come from a completely different background--I want to create...

Which is why I promise to do that at the bottom of the message? :p

Sorry for the late reply! The strange thing is that I already calibrated the CCD to at the very least filter out bias and dark noise. The only thing I can come up with is that the high intensity of the laser caused the CCD to warm up even further, which generated more dark noise. What do you...

Thanks for the help! I'm using the Python language, by the way The peaks were much broader than the reflectivity of my mirrors predicted, so instead of subtracting the sub-peaks (I couldn't find a broad enough Airy distribution to do that) I did it with a little detour. I found approximate Airy...

It seemed like that to me as well. From a qualitative point of view, what you see when you perform this experiment is a ring pattern "collapsing" into its center. The sub-peak is caused by the penultimate ring falling into the CCD-array's field of view. I have yet to take my signal processing...

Hi all, I performed a resonance experiment over the past two weeks, in which I collected the intensity of a Fabry-Perot cavity whilst adjusting the mirror distance with a piezo-element (the specific setup of the experiment is fairly detached from the question I will ask). My raw data is...

Hi everyone! I'm Matthijs, a Dutch Physics undergrad looking forward to hanging out on this website :-)