Do radio & TV signals travel forever?
From: Asimov (Asimov_at_-removethis-bbs.juxtaposition.dynip.com)
Date: 08/20/04
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Date: Friday, 20 Aug 2004 08:31:58 -500
"ReeferGuy" bravely wrote to "All" (19 Aug 04 17:46:21)
--- on the heady topic of "Do radio & TV signals travel forever?"
Re> From: ReeferGuy@webtv.net (ReeferGuy)
Re> I've seen TV shows where they say that radio signals are about 80
Re> light-years out from Earth.
Re> TV signals, about 50 or so light-years out there.
Re> Do they just keep moving at ligt speed forever?
Re> Thanks.
No, the signals spread out and eventually reception gets too faint to be
heard above the normal radio noise background. This is probably the
reason seti has failed so far. They should instead search for lasers.
A+s+i+m+o+v
... Isaac Asimov : 1920-1992 : Gone to the stars!
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