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From: becker@uiucdcs.UUCP
Newsgroups: net.physics
Subject: long lever - (nf)
Message-ID: <2519@uiucdcs.UUCP>
Date: Wed, 3-Aug-83 22:28:32 EDT
Article-I.D.: uiucdcs.2519
Posted: Wed Aug  3 22:28:32 1983
Date-Received: Sat, 6-Aug-83 17:28:09 EDT
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#N:uiucdcs:24400033:000:501
uiucdcs!becker    Aug  3 05:19:00 1983

this is perhaps a silly question, but here goes....

i have a lever that is ten light-years long, hinged at one end, free at the
other. for the sake of argument, Mr. A is at the free end, and Mr. B is at
the other. the two have agreed that Mr. A will swing his end of the lever, and
as soon as Mr. B detects the motion, he will signal Mr. A with a laser.

my question is, how long will Mr. A have to wait after pushing the lever 
before he sees Mr. B's laser?

thanks in advance,
craig becker uiucdcs