PeterDonis's latest activity

The OP question has been answered, and this thread is closed. @DanteKennedy we've established that whatever sources you have used to...

This is not correct. Quantum tunneling does not involve decoherence or measurement. Yes, it is. See above.

I'm not aware of any such relationship. Why do you think there is one?

Sure he can, just not at rest in a single inertial frame. But he can consider himself to be at rest in a non-inertial frame.

And for one more comment if we need it, you're contradicting what you yourself posted in post #7 of this thread--where you made the same...

Note, btw, that this is also not a direct observation; it's a calculation. For what gets directly observed, look up Penrose-Terrell...

Please read post #24 again. It explicitly uses the term "length contraction", and claims that this explains the shorter travel time by...

Not if he's going to say that the Earth-star distance is length contracted to a few light-months. That claim requires him to be using an...

Not on this view, he doesn't. On this view, he's at rest the whole time. See my post #26 just now.

This is only part of the picture. First, in order to apply length contraction to the Earth-star distance, as you are doing, we have to...

So ##M / \pi R^2## is the areal density. I see.

You can't. You don't get to freely choose how the area element works. That's already chosen for you by the fact that you're using polar...

Here is how the mass distribution issue looks to me. I'm not sure if this is the same thing you're saying here or not. The area of the...

One suggestion: consider the KE (or even the total energy--no need to subtract out rest energy, it just adds more math) as a function of...

To put this another way: the proper acceleration required to keep a small piece of the disk on its circular path grows with radius, and...