this post was submitted on 05 Sep 2023
1284 points (97.2% liked)

Science Memes

11217 readers
4649 users here now

Welcome to c/science_memes @ Mander.xyz!

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.



Rules

  1. Don't throw mud. Behave like an intellectual and remember the human.
  2. Keep it rooted (on topic).
  3. No spam.
  4. Infographics welcome, get schooled.

This is a science community. We use the Dawkins definition of meme.



Research Committee

Other Mander Communities

Science and Research

Biology and Life Sciences

Physical Sciences

Humanities and Social Sciences

Practical and Applied Sciences

Memes

Miscellaneous

founded 2 years ago
MODERATORS
 
you are viewing a single comment's thread
view the rest of the comments
[–] paholg@lemm.ee 2 points 1 year ago (2 children)
[–] merc@sh.itjust.works 1 points 1 year ago (1 children)

If that were true, the gravity wave detector wouldn't work.

[–] paholg@lemm.ee 1 points 1 year ago (1 children)

Are you sure about that? My understanding is that gravitational waves are predicted by general relativity, not inconsistent with it.

In any case, "all models are wrong, but some are useful". Gravity as curvature is a pretty damn useful model.

[–] merc@sh.itjust.works 1 points 1 year ago

No, I'm not sure about it. And general relativity did predict gravity waves, and did generally describe gravity as being the curvature of spacetime.

Having said that, if "gravity waves" move at the speed of light, but speed is distance over time, how can you measure a "speed" when the thing whose speed you're measuring warps the units you use to measure it? It seems like you could talk about the movement of gravitational waves from the point of view of an observer outside the system with a ruler and a stopwatch that were unaffected by gravity. But, general relativity seems to suggest that there are no absolute / external reference frames you could use.

I fully admit that I don't completely get general relativity, and that it has been a very useful model. It just seems like it can be a useful model even if there are certain dusty corners where you shouldn't spend too much time looking because things stop making sense there.