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Physics, Astronomy & Cosmology / Re: An interesting pattern
« on: 26/07/2006 22:30:55 »
Direction?
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All well and good, but this discussion at first just seems to sharpen the paradox! Stella sees what Terence sees: a slow clock on the Outbound Leg, a fast clock on the Inbound Leg. Whence comes the asymmetry between Stella and Terence?
Answer: in the duration of the Inbound and Outbound Legs, as seen. For Stella, each Leg takes about a year ... Terence sees an Outbound Leg of long duration, and an Inbound Leg of very short duration.
So there's the fundamental asymmetry: the switch from redshift to blueshift occurs at Stella's Turnaround. Stella sees Terence's telescopic image age slowly on her Outbound Leg, but the image more than makes up for its dawdling on the Inbound Leg. Terence sees Stella's image off to a slow start too, but here the image's final burst of rapid aging comes too late to win the race. [In other words, Terrance sees Stella's clock as not going fast enough on the return leg to catch up with the time on his own clock.]
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The regular pulses are redshifted to lower frequencies during the Outbound Leg, and blueshifted to higher frequencies during the Inbound Leg … And Stella computes the same for Terence … Stella sees what Terence sees: a slow clock on the Outbound Leg, a fast clock on the Inbound Leg.
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Will you be moving some of the old - or at least the recent - environment-related threads across to this forum, so that they’re easier to find? For example, global warming, manhattan project for clean energy, etc.)
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PAUL
its a good idea and I don't mind doing it but its finding them all.
They will all have be read to be sure of their content which could take sometime as we don't want to fill this lovely new forum with things which would be better left where they are but if you know of any good candidates then start a new post containing shortcuts to them and i will take a look
Michael