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- Newsgroups: rec.puzzles
- Path: sparky!uunet!gatech!darwin.sura.net!blaze.cs.jhu.edu!godel!arromdee
- From: arromdee@godel.cs.jhu.edu (Ken Arromdee)
- Subject: Re: Direction of the sun
- Message-ID: <1992Dec24.090123.14744@blaze.cs.jhu.edu>
- Sender: news@blaze.cs.jhu.edu (Usenet news system)
- Organization: Johns Hopkins University CS Dept.
- References: <1992Dec24.012636.17115@Csli.Stanford.EDU> <Bzr9GF.3uM@hplabs.hpl.hp.com>
- Date: Thu, 24 Dec 1992 09:01:23 GMT
- Lines: 19
-
- In article <Bzr9GF.3uM@hplabs.hpl.hp.com> potamian@hpl.hp.com (Spyros Potamianos) writes:
- >However a friend of mine pointed out that both systems must give the same
- >answer, as this is a "kinematic" problem (is this the correct term???) and no
- >forces are involved, so both a geocentric and a "solarcentric" point of view
- >must provide the same answers.
-
- In the original geocentric and heliocentric systems, light rays move in
- straight lines. In the mapped-geocentric-onto-heliocentric and vice-versa,
- light does not move in straight lines. There is therefore no reason to
- expect the same answer in X and Y-mapped-onto-X systems.
-
- Your calculations show that in Y and in Y-mapped-onto-X systems you get the
- same answer, but the latter does not give the same answer as X.
- --
- "the bogosity in a field equals the bogosity imported from related areas, plus
- the bogosity generated internally, minus the bogosity expelled or otherwise
- disposed of." -- K. Eric Drexler
-
- Ken Arromdee (arromdee@jyusenkyou.cs.jhu.edu, arromdee@jhunix.hcf.jhu.edu)
-