Re: [SR] Dismaying intellectual desert?

Le 02/04/2024 à 14:48, "Paul B. Andersen" a écrit :

 

 Vapp=v/(1+cosµ.v/c)
If v=c and cos=0 (tranversal move), Vapp=c.

Let's stay in the real world.
 The only objects moving at "relativistic speeds" we
can visually observe, are astronomical objects, like
the matter in the jets from some galaxies (from their
central black hole).
 The only motion we can visually observe, is transversal motion.
 So if the jet is coming right at us, we will see the matter
at exactly the same point at the centre of the galaxy, the apparent speed of the matter is zero.
 But when it is approaching you at an angle, you can measure the
angular velocity, and when the distance is known, you can calculate
the apparent transversal velocity, which indeed may be higher than c.

No. It's impossible.
“There will therefore be an impassable speed limit which will extend to all particles, objects, or laws of physics.”
                 Doctor Richard Hachel November 9, 1985 Conference in Wroclaw (Polska).
You cannot have an observable speed (Vo) greater than c.
Which is also synonymous with any speed measured by a transverse observer.
For apparent speeds, you can have, if µ is negative (µ=0 to -180°), apparent speeds
greater than that of light.
I'll let you calculate what is the observable speed necessary to obtain an apparent speed greater than that of light if µ=180°
R.H.