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Old 27-10-2008, 06:22 PM
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sjastro
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Quote:
Originally Posted by NQLD_Newby View Post
Hi everyone, I love this stuff.

Steven could I ask for some further clarification please?

I understand your statement, however, if t1, t2 and t3 above are measureable in your first example with the slow moving car, wouldn't the three observers simply claim that you turned your headlights on at a different time? (observer 1 @t1, ob2 @t2, and so on). I realise that you actually turned them on once only, but isn't that what relativity is all about? Everyone will have different measurements of such experiments because their measurements are relative to their position in time-space? This includes your own perceptions of when you turned the lights on.

Please bare with me, and correct me if I'm wrong as I am only just learning all this stuff. My statements are mearly how I understand GR, and SR, and I would love some further guidance where this is concerned.
Hello Rex.

Observers 1,2,3... are all stationary and are therefore in the same frame of reference.

t1,t2, t3...... are elapsed times and varies according to distance. Since each observer is in the same frame, the time when the headlights are turned on is synchronized for all observers.

If the observers are in motion at different velocites, then the time is no longer synchronized. The time for each observer is calculated by the Lorentz transformation.

Regards

Steven
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