Sujet : Re: Incorrect mathematical integration
De : ram (at) *nospam* zedat.fu-berlin.de (Stefan Ram)
Groupes : sci.physics.relativityDate : 20. Jul 2024, 12:10:40
Autres entêtes
Organisation : Stefan Ram
Message-ID : <addition-20240720120420@ram.dialup.fu-berlin.de>
References : 1 2
Mikko <
mikko.levanto@iki.fi> wrote or quoted:
On 2024-07-19 19:51:32 +0000, Richard Hachel said:
I once explained to a speaker that additions of relativistic speeds
were not done in a common way, and that for example 0.5c+0.5c did not
make c.
That is a clear indication that you cannot explain.
When nobody says otherwise, the symbols in "0.5c+0.5c" mean what
they usually do (from math class back in school), so that sum is
still c. Thing is, it doesn't give you the speed of a guy relative
to Earth in a situation where he's cruising at 0.5c on one of
those moving walkways that's also zipping along at 0.5c itself.