PeterDonis's latest activity

The light clock is really very simple. If you accept the invariance of the speed of light, then time dilation, length contraction and...

Let's stop right here. We will not get far by insisting that "we all must agree that 2 + 2 = 5". A given flash bulb (for example) has...

What else would be involved? No, they don't. The source can only be motionless with respect to one of them. Until you fix this...

Also, note that @Ibix said that the point is motionless, not that the source is motionless when it is at that point.

How? This is not quite as straightforward as you seem to think. I have no idea unless you explain how you did the Schwarzschild...

No, you don't. The light source is not a point. It's a worldline--the path through spacetime of an object (whatever object emits the...

This is not correct and it is not an implication of the light cone (sphere). The light cone says that if there are rays in every...

And by the way, @Lynch101, this is an "A" level topic (and arguably might belong in the Beyond the Standard Models forum). It might be...

You need to actually look at some references and see if they describe the process in a way that matches one or the other of your claimed...

I only have time for a quick reply now, just focusing on some issues with your first bullet: .. in the ship's inertial frame (assuming...

Simultaneously in what frame? I assume you mean the rest frame of the bridge, but in any relativity scenario, you should always...

From the article, there is a lot of competition between the carriers to 'prove' that their network is better than the competitions'...

"Mate, your signal strength is always better than mine. What network are you with?"

The paper is silly, to put it mildly. The crux of their argument is that the set of axioms is arithmetically expressive and therefore...

It's not really a speculation by you personally, it's just restating what's already in the literature (for example, in the Wald excerpt...