Re: The velocity of light going pass a moving train.



"Gerald L. O'Barr" <globarr@xxxxxxxxx> wrote in message
news:1182475967.306075.291420@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Subject: Re: The velocity of light going pass a
moving train.
[snip reply to sue's silly qquestions :)}

To repeat: The angle that is measured in the
frame of the track is exactly classical,

No .. it is not

and it does
not matter how fast the train is moving.

Even in the classical case, it matters. If the light is vertical in the
train FoR, it will not be vertical in the track FoR, no matter what non-zero
speed the train is moving in the x direction.

If you meant that the velocity does not make the result different from
classical predictions, then you are wrong.

The correct
vector analyses is the simple absolute velocity of
light, c, and the absolute velocity of the train, v,
and what these vectors produce is what will be
measured in the track frame.

And the result is different to what classical aberration would give you.

The only problem is in
knowing the exact angle of the light, and this
certainly is not hard to know, as it has been
correctly stated.

The only problem is the dodo who thinks relativity makes the light aberrate
in the opposite direction. Relativity exaggerates the classical aberration
... to the point that is the train were travelling at c, the light would be
aberrated to be at a 0 deg angle (ie it would be seen from the track as
travelling horizontally in the same direction as the train .. whereas
classical aberration would say it travels at 45 deg.


.



Relevant Pages

  • Re: OT Speed of light stuff - was Pluto.
    ... Here on earth, we measure speed relative to earth, which is moving ... > pretty fast as it circles the sun. ... in a stopped train, for example, and looked out the window and saw another ... You could try dropping a ball but it ...
    (rec.outdoors.rv-travel)
  • Re: OT Speed of light stuff - was Pluto.
    ... Here on earth, we measure speed relative to earth, which is moving pretty fast as it circles the sun. ... It would seem that if we employ the movement of earth as it circles the sun, we could fire rockets into space, with greater speed and less rocket boost than if we fired them counter to the movement of the earth around the sun. ... and saw another train passing, you would not be able to tell whether ... You could try dropping a ball but it ...
    (rec.outdoors.rv-travel)
  • Re: The train and the light inside.
    ... the relative speeds are being ignored if such is true. ... faster time rate than has the train because the train is moving faster ... they must be moving at the same speed ... They cannot be at CV with just "constant relative motion" unless they ...
    (sci.physics)
  • Re: The train and the light inside.
    ... Let's say they are moving at CV as they accelerate, ... I'm sitting on a train headed east at 97 mph. ... Yes, you do, but you and the train are not at CV wrt to the earth. ... only you and the train changed speeds and so you are no longer at CV ...
    (sci.physics)
  • Re: Another Question They Cannot Answer
    ... moving train by simply hopping on board and pulling out your tape. ... But don't be ridiculous, Henri. ... Is the slope of a hill an intrinsic property of that hill? ...
    (sci.physics.relativity)

Loading