Re: Space-time interval...

Le 13/08/2024 à 15:31, M.D. Richard "Hachel" Lengrand a écrit :

Le 13/08/2024 à 13:42, Python a écrit :

Le 13/08/2024 à 13:38, Mikko a écrit :

 

>
Until very very recently (you can check on fr.sci.physique) he firmly
believed that ds^2 is always zero, go figure!

 That's not what I actually said.
I was talking about an event occurring in a frame of reference
and whose information reached any observer present in this frame of reference.
For example, a terrestrial observer who observes the explosion of a supernova.
If the explosion took place 15,000 years ago, the observer will note (dl,dt)=(15,000,-15,000)
and therefore ds²=0

This utterly idiotic! A space-time interval is about TWO events, there
is only one event here.
I thought you had, at least, understand that an interval is between two
events. I notice that you didn't even understand that.
You are getting more and more silly every single day old man.