Re: The relativity of simultaneity

On Aug 1, 9:40 am, jem <x...@xxxxxxx> wrote:
kenseto wrote:
On Jul 31, 8:50 am, jem <x...@xxxxxxx> wrote:
kenseto wrote:
On Jul 29, 8:47 am, jem <x...@xxxxxxx> wrote:
kenseto wrote:
On Jul 25, 9:47 am, jem <x...@xxxxxxx> wrote:
kenseto wrote:
On Jul 22, 9:38 pm, gl...@xxxxxxx wrote:
Ken Seto wrote,
< Therefore if the strikes occur simultaneously at equal distance then
he will observe them to be simultaneous. >
  "Simultaneously" as measured by him is not the same as it is as
measured on the track.
I agree...so what is your point? The track observer will see the
flashes to be simultaneous at time 0.5L/c. The track observer will
predict that the train observer sees the flashes to be simultaneous at
time 0.5L*gamma/c according to the track clock.
Which means that whenever the train's speed exceeds c*sqrt(0.5), the
train observer won't see the light flash until AFTER he's passed the
place where the lightning struck the track.  Setoland sure is a funny
place - I can see why you spend so much time ROTFLOL.
Indeed ROTFLOL....the two light rays that hits M were absorbed by M..
Two different light rays from the expanding light spheres will hit M'.
What this mean is that your are ROTFLOL at your own stupidity. LOL.
M' is between M and a light source, and you "think" light from the
source gets "absorbed by M" and that prevents it from reaching M'?
That's how Einstein's gedanken set up. He said that the reat light ray
will hit M (and thus absorbed by M) but then it continue on to hit M'
which is impossible since it has already been absorbed.
I didn't think that at all. I think that two light rays from the light
spheres will hit M simultaneously and two different light rays from
the light spheres will hit M' simultaneously.
Seto, M' is between M and the light source that M' is heading toward -
it's obvious to 4-year olds that the light reaches M' before it
reaches M.

It is not obvious at all. In the train frame the train observer is not
moving wrt the light fronts at all. In case you are too stupid to
understand ....that's the reason why the train observer measures the
speed of light to be isotropic. The two light rays that hit M'
simultaneously will take a longer time to reach M' than the light rays
that hit M.

You've got yourself all confused, Seto.  Let's do it in baby steps.
Suppose M' (i.e. the train observer) is BIG, i.e. REAL BIG (see
picture below).  How is the light from the rightmost light source (S)
going to get by M' in order to reach M (i.e. the track observer)?

            |
            |
            |
            |
            |
            |
            |
            |
            |
M........M'|...........S-

ROTFLOL.....That was your arguement. You said that M' sees the front
flash before the rear flash and I countered that if M and M' are in a
straight line as you shown then the front flash will have already
absorbed by M' and will not be able to continue on to hit M. Then you
made the laughable arguement that it goes through M's' legs!!!!
My real arguements why both M and M' see the flashes to be
simultaneous are as follows:
1. The two lightning strikes are expanding light spheres expanding
toward M and M'.
2. M is at a lower state of absolute motion than M'. That means that
the light path length for the light rays to reach M is shorter than
the light path length for the light rays to reach M'.
3. Therefore the two light rays that hit M simultaneously will arrive
at M at an earlier time.
4. Therefore two different light rays that hit M' simultaneously will
arrive at M' at a later time.

Mathematically the above is expressed as follows:
From the track point of view:
The the light path length in the track is the same as the physical
length 0.5L where L is the length of the train.
Therefore the time interval for the light rays to arrive at M
simultaneously is 0.5L/c.
The light path length in the train is 0.5L*gamma.
Therefore the time interval for the two different light rays to arrive
at M' simultaneously is 0.5L*gamma/c.

Ken Seto
.

Relevant Pages

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  • Re: The relativity of simultaneity
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  • Re: The relativity of simultaneity
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