PeterDonis's latest activity

You can't, because a black hole is not made of anything you can build something from. A black hole is just spacetime geometry. It's not...

Classically, a black hole can have any size. There's a minimum mass for one to form by stellar collapse, because smaller stars don't...

On a re-read, are you using "singularity" and "black hole" as synonyms? They're not the same thing. The singularity is inside the black...

I don't agree. What an accelerometer measures is not theory dependent. Newtonian gravity agrees that an accelerometer attached to a body...

Yes, that is what I mean. I will point out that we are having this conversation in the Special and General Relativity subforum, so...

Not if you define it as invariant mass times proper acceleration--which is how relativity defines it. Both of those are invariants.

The electromagnetic force on an otherwise isolated charge can be measured with an accelerometer. This measurement is frame-independent...

All of this is very helpful indeed! I'm going to try to work through the details on my own, so that I make sure I really understand and...

Kind of going back to the original question. To understand why gravity is considered a fictitious force ( I prefer the term inertial...

I should add that there are different versions of the equivalence principle. For something called the strong equivalence principle...

He can't because, as he said, it doesn't. The logic is the other way around: if you construct a theory where gravity is a geometric...

Thread closed for moderation.

If there's a link to what you're referencing, that's much better, yes.

@DavidL070949 please post your math directly in the thread using LaTeX. There is a LaTeX Guide link at the bottom left of each post window.

The OP question has been addressed and the thread will remain closed.