Natural Science Forum / Physics / Relativity / April 2005

My question is the case in which a charge is moving
at a velocity greater than the velocity of light
in a medium (c/n < v < c).

(*)"The special theory does not forbid all motions
faster than light but only motions which could lead
to a distruption of cause-and-effect relationshp."

Have you thought with aid of Maxwell's equations that
what an observer sees in case of c/n < v < c ?

I found one writing about this and very strange result was
that observer saw multiple images of charged particle
(Cherenkov radiation source) ?

Bolotovskii, B. M. and Bykov, V. P., 1990.
Radiation by charges moving faster than light.
Sov. Phys. Usp. 33 (6), June 1990, 477-487.

I think that all results from above important
writing should be confirmed experimentally !!!

Page 477.
1. "The most interesting feature of the radiation
by sources moving at a superluminal velocity is
that an observer at rest sees not a single real
radiator but several spatially separated radiating
objecs. They will be called "images" below. This
multipicity of images is seen in all the examples
discussed below."

Contents of the writing:

1. Introduction.
2. Motion of a charge at a velocity above the
velocity of light in a vacum.
3. Lienard-Wiechert potentals for superluminal motion
4. Uniform rectilinear superlumnalmoton of a charge
and a dipole.
5. Uniform superluminal motion of a chage along a circle.
6. Conclusion.

(In 4. there is treated possible generalization (???)
of the (c/n < v < c) results a case of the radiation
by a dipole in uniform rectilinear motion at a
superluminal velocity in vacuum: v > c.

This only example has the strange feature of time
reversal in "space-like" area (for example inside
Schwartzchild black-hole's event horizon is
"space-like" area (v > c) and outside Schwartzchild
black-hole's event horizon is "time-like" area (v < c)).

This is only case in the writing which I found which
possible contradicts with the (*) but
I think that if it true then it could give possibilities
to some more reasonable descrptions of interior of
Schwartzchild black-holes than that "not acceptable"
t <--> r ("clock" is rotated to "meter stick")
transformation ???

Would this time reversal mean if true that it is not
possible to fall from outside of Schwartzchild black-hole
into inside Schwartzchild black hole ?

(My: Schwartzchild black-hole's mass exchange happens possible
with those "fastener places" (two per "radiating periphery")).

Please take a look the important writing !!!

Hannu Poropudas