Re: question on wheeler feynman absorber theory

babaluyee wrote on Fri, 18 Apr 2008 17:52:42 +0000:

In their original paper the authors derive a phase between the
acceleration of the source and the advanced wave at the source coming
from the absorber. This phase is needed in order to conclude that the
reaction is proportional to the time derivative of the acceleration
rather than the acceleration itself.

To arrive at this phase however the authors argue that while the speed
of the retarded wave is reduced by interacting with intervening medium
between the source and the absorber particle in question, the speed of
the advanced wave on its way from the absorber particle to the source is
the speed of light and does not interact with intervening particles. The
reason for this they say is that unlike the retarded wave which they
treat as the combination of the primary retarded wave and the secondary
waves that come about from the interactions with intervening particles,
the advanced wave is an ELEMENTARY interaction between the absorber
particle in question and the source and therefore does not interact with
other particles. What is this difference between the treatment of the
advanced and retarded wave motivated by?

Because otherwise the theory would predict unobserved phenomena. E.g.
instead the total force

F_ret + R

with R the damping force you would obtain

F_adv - R

Why is one considered
elementary and the other not?

/Ad hoc/ Their theory does not explain that. They argued explanation
would be second law thermodynamics.

Isn't this a time asymmetric assumption?

Yes.

If the answer to the last question is yes then why do we need to blame
the time asymmetric dominance of diverging waves over converging waves
on asymmetric initial conditions why not also blame it on this
asymmetric treatment of advanced and retarded waves?

Both approaches are blamed at this point.


--
http://canonicalscience.org/en/miscellaneouszone/guidelines.txt

.

Relevant Pages

  • question on wheeler feynman absorber theory
    ... acceleration of the source and the advanced wave at the source coming ... from the absorber. ... of the retarded wave is reduced by interacting with intervening medium ... the advanced wave on its way from the absorber particle to the source ...
    (sci.physics.research)
  • Superluminal deBroglie Pilot Waves & Magnetoelectrism
    ... Broglie proposed the concept that every particle had a pilot ... wave envelope enclosing it and moving at the particle's velocity. ... Electromagnetism and Magnetoelectrism: ... The gauge symmetry for this system of fields is U ...
    (sci.physics)
  • Re: Why is the speed of light as it is
    ... physics.The more I learned physics the more I found that there was no ... > misplaced 96% the matter in the universe, I realized that something was very ... > amount of energy to force a particle of mass to reach the speed of light! ... > particle become a wave?" ...
    (sci.physics.relativity)
  • Re: evidence for the existence of the ether
    ... It has been shown that light is also a particle, ... water wave moves through them. ... dark matter and dark energy, but which become light whenever the two ... parts are combined in collisions of the moving dark energy lw with the ...
    (sci.physics.relativity)
  • Re: The SRians Said: Time is What the Clock Measures
    ... > only alternative remaining is special relativity. ... >>a wave that propagates that medium. ... > any massless particle. ... While the traveller experiences 81 sunrises, ...
    (sci.physics.relativity)