PeterDonis's latest activity

Another vital point about the paradox without acceleration is that it shows that differential ageing is fundamentally different from...

@smaricic your latest post referencing Brian Greene's lecture on SR has been deleted, since its content makes clear that we all are...

Thread closed for moderation.

Thread closed for moderation.

No, those boundary conditions are for a particle on a lattice, not a particle confined to a finite region.

No, if the particle is confined in a box, the momentum eigenstates are different. You have to actually solve the Schrodinger Equation to...

I think that's reasonably standard terminology, yes.

By no means. It could be bouncing back and forth within the confined space very fast. Or very slow. Or not at all.

What I meant was, we have a large number of results of momentum measurements on the particles that were prepared as I described, and we...

What do you mean by "sample" here? What I described was preparing a large number of particles in the same state, and measuring the...

Here are some more things to consider as food for thought: In RocketGirl's rest frame, the Earth is moving in the minus ##x'##...

If by "the Copernican view", you mean the view that the Sun is the center of the universe, what makes the Sun special? The Sun itself is...

No. No. What is the case is that using a frame with the Sun at the center (or to be more precise, with the barycenter of the Solar...

Actually, as my post #15 indicates, you can use the time dilation formula to get the correct answer for that particular question...

This is actually correct--if you correctly understand what "a smaller amount" means here. If you look at the numbers I gave in post #14...