Re: Photon, Momentum, Mass

On May 7, 1:09 pm, Bilge <dubi...@xxxxxxxxxxxxxxx> wrote:
On 2007-05-05, John Kennaugh <J...@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:





Tom Roberts wrote:
John Kennaugh wrote:
Tom Roberts wrote:
What "physical process" makes it be _straight_?
As per Newton's laws of motion.

This is not at all a "physical process".

I did not say it was.

If you like it is an axiom of physics that 'straight' is natural and
a physical process is required to change it from that natural state.

So you DON'T really expect a "physical process", even though you have
repeatedly demanded one.

I don't expect a physical process when none is required.

This is in essence an assumption that Euclidean geometry applies
(geodesics in E^3 are where "straight lines" come from).

Laws of motion have nothing to do with Euclidean Geometry.

Wrong. As soon as you assume some geometry for the universe, the
laws of motion follow.- Hide quoted text -

- Show quoted text -

John's original statement was, "Put simply if the speed of light is
not dependent on the physical processes taking place in the source
then what physical process is it dependent upon?"

The geometrical argument does not answer the question of why when
light is emitted from a moving source the speed of the source does not
increase the speed of the light. Only the physical processes taking
place in the source could influence the speed at which the light is
emitted. Once it is emitted, then a geometrical argument can be used
to say what happens to the light thereafter.

Vern

.

Relevant Pages

  • Re: Splitting the genres
    ... That's a commonsense view of things, ... new physical process to the way things work, ... it wouldn't change the fundamental nature of the ... laws of nature; not fundamentally worse than the change from Newtonian to ...
    (rec.arts.sf.written)
  • Re: Photon, Momentum, Mass
    ... I don't expect a physical process when none is required. ... Laws of motion have nothing to do with Euclidean Geometry. ...
    (sci.physics.relativity)
  • Re: Photon, Momentum, Mass
    ... As per Newton's laws of motion. ... a physical process is required to change it from that natural state. ... As soon as you assume some geometry for the universe, ...
    (sci.physics.relativity)
  • Re: Have you ever wondered.....
    ... The physical process of *seeing* states is followed by the intellectual process of recording and recalling and comparing locations, from which motion is inferred. ... Look at http://dictionary.reference.com/ and lookup 'inference', which is there defined as: a. ...
    (sci.physics.relativity)
  • Re: Have you ever wondered.....
    ... They don't depict motion. ... > -If we compare two states, all we can compare is positions, ... Motion is not the result of an intellectual process. ... Motion is a physical process the ...
    (sci.physics.relativity)