For a time, I was interested in a postulated obscure relativistic effect called Transverse Gravitational Redshift. I tried to check the calculations and, in 2019, wrote a simulation of relativistic motion. The simulator works in 3+1D special relativity, uses adaptive time steps, and can reproduce the twin paradox. The project is on Github here:
But to simulate the Transverse Redshift requires general relativity, and extending the simulator to support that would be a huge effort, so I stopped working on it. Still, I think it is a useful software for teaching special relativity.
I don’t recommend looking into the effect because it was suggested by a quack as the cause of (perceived) accelerated cosmic expansion. Only if you are still interested in this hobby horse of mine, read on. The effect has been discussed on physics fora here and here. A charitable explanation is here. If the calculations are correct the effect is very small (10^-16 at 1g; and if the calculations are wrong, it is zero). The problem is that general relativity is hard; nobody does calculations except for the guy claiming it—and he doesn’t do it in small steps. Everybody who checks makes errors, even physics profs. There are a lot of irrelevant tangents (“doesn’t hold for high velocities”) or ad-hominems. The last reported error in the debunks went unanswered. Based on what you find online, nobody can know if the thing holds or not. The problem is that the guy is an asocial arrogant quack. He does make testable predictions and provides detailed instructions to reproduce with the SDSS dataset (but please start reading at page 10, or you will fall back over). If he is onto something, we will never know because nobody will take the social risk to associate with him.
For a time, I was interested in a postulated obscure relativistic effect called Transverse Gravitational Redshift. I tried to check the calculations and, in 2019, wrote a simulation of relativistic motion. The simulator works in 3+1D special relativity, uses adaptive time steps, and can reproduce the twin paradox. The project is on Github here:
https://github.com/GunnarZarncke/timewarp
But to simulate the Transverse Redshift requires general relativity, and extending the simulator to support that would be a huge effort, so I stopped working on it. Still, I think it is a useful software for teaching special relativity.
I don’t recommend looking into the effect because it was suggested by a quack as the cause of (perceived) accelerated cosmic expansion. Only if you are still interested in this hobby horse of mine, read on. The effect has been discussed on physics fora here and here. A charitable explanation is here. If the calculations are correct the effect is very small (10^-16 at 1g; and if the calculations are wrong, it is zero). The problem is that general relativity is hard; nobody does calculations except for the guy claiming it—and he doesn’t do it in small steps. Everybody who checks makes errors, even physics profs. There are a lot of irrelevant tangents (“doesn’t hold for high velocities”) or ad-hominems. The last reported error in the debunks went unanswered. Based on what you find online, nobody can know if the thing holds or not. The problem is that the guy is an asocial arrogant quack. He does make testable predictions and provides detailed instructions to reproduce with the SDSS dataset (but please start reading at page 10, or you will fall back over). If he is onto something, we will never know because nobody will take the social risk to associate with him.