PeroK's latest activity

In Helliwell's SR book, he says "every new theory swallows the previous one whole"! Newton is inside SR, which is inside GR, which will...

I have written a paper on the role of acceleration in the twin paradox. In short, acceleration is not essential, but still there is a...

There's no place you can go to learn any such thing. But you'll get a lot closer to it learning from textbooks and peer-reviewed papers...

I'd put it this way: the question "where was Feynman wrong?" isn't well-defined, because there's no single "the" explanation of the twin...

The idea that Richard Feynman didn't understand the basics of relativity as well as anyone else who ever lived is cretinous.

There's no single, correct way to explain the twin paradox. People on YouTube who prefer a certain explanation like to say that everyone...

The auto-message I got when I signed up here suggested making an into thread, so this is an intro thread. I'm currently an...

What does conservation of (horizontal) momentum give you?

What quantity is conserved in this scenario?

A book that lies unopened conceals its wisdom.

If you find yourself alone on a Saturday night, you cannot blame the laws of physics.

Mr3000 asks the same question ad infinitum. When infinite time has passed, he shall have our answer.

Moreover, this sort of idle speculation is probably just a waste of time. Anyone can throw words together. Learning real physics, on the...

For those interested in the practical side of interstellar travel, the Universe Today have a 5 part series covering the history of...

That's not the point at all. The point at issue is that if we were visited by an alien intelligence from a star, say, 20 light years...