sci.physics.relativity

"Dr. Henri Wilson" wrote in message
news:fckks39n62irriujsu1n9v9spm9duu4c0o@...
> On Sat, 1 Mar 2008 11:42:26 -0800, The Ghost In The Machine
> wrote:
>
>>In , HW@....(Dr. Henri Wilson)
>>
>> wrote
>>on Fri, 29 Feb 2008 21:55:21 GMT
>
>>>
>>> Ghost, at least has the ability to think.
>>>
>>> YOU cannot even understand the question.
>>>
>>
>>I still dispute your claims, of course. One might have
>>to reframe the question in any event, and simply ask .
>>if one has a set of observers seeing the clock strike 12
>>(as observed by a flash of light, for simplicity), and
>>then strike 12:00: a millisecond later, what they
>>would see on their local wristwatches as a time interval
>>between the two clock strikes.
>>
>>That answer depends on their movement (but not their
>>positions), it turns out, at least according to SR.
>
> ...according to any theory....
>
>>The actual reading of the clock, as Paul asserts, will not
>>-- everyone sees the two strikes, and will agree that the
>>clock struck twice.
>
> Of course the bloody clock doesn't change just because someone in Alpha
> Centauri looks at it.

Glad you agree. Because the clock shows the proper time for the clock.
Someone else looking at it doesn't change it. Just as someone else looking
at the proper length of a rod does not change the proper length (hence the
'proper' adjective)

>>This is fine; I see this as a semantic point only.
> Paul's understanding of English is not always perfect particular in cold
> weather when the blood doesn't flow fluently to his brain.
> It should have been obvious that both you and I were refering to the
> APPARENT
> reading of the 'giant digital clock'.

That will be affected by relativistic Doppler. Others looking at the BIG
CLOCK may see it (ie the image they receive of the clock when it arrives at
the observer, or signals sent for every tick) ticking at either a faster or
slower rate as given by the relativistic Doppler shift. And so it may
appear to be either faster or slower depending on whether you are moving
toward it or away from it. If there was a point in the past (say) when you
were at the same location as the BIG CLOCK (and synched your own clock to it
and then moved away from it), you can easily calculate what the image you
see of the clock would be, based on how long you had been receiving ticks
from it using that relativistic Doppler shift.