| Topic: |
Science > Physics |
| User: |
"Pentcho Valev" |
| Date: |
06 May 2007 02:21:07 AM |
| Object: |
THE INCREDIBLE INTELLIGENCE OF EINSTEINIANS |
http://en.allexperts.com/q/Astronomy-1360/speed-light-2.htm Steve
Carlip, a professor of UC Davis: "While GR does not require constant
c, neither does it prohibit constant c. In fact, recent experiments
have strongly indicate that gravity travels at c, thereby confirming
the constancy of c in GR."
Pentcho Valev
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| User: "Androcles" |
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| Title: Re: THE INCREDIBLE INTELLIGENCE OF EINSTEINIANS |
06 May 2007 04:27:19 AM |
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"Pentcho Valev" <pvalev@yahoo.com> wrote in message =
news:1178436067.623551.17960@n59g2000hsh.googlegroups.com...
http://en.allexperts.com/q/Astronomy-1360/speed-light-2.htm Steve
Carlip, a professor of UC Davis: "While GR does not require constant
c, neither does it prohibit constant c. In fact, recent experiments
have strongly indicate that gravity travels at c, thereby confirming
the constancy of c in GR."
=20
Pentcho Valev
What recent "experiments"?
The only "experiments" so far have provided nothing.
Whenever a sentence begins with "In fact", it is a sign that the=20
moron is about to lie through his teeth.
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| User: "Pentcho Valev" |
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| Title: Re: THE INCREDIBLE INTELLIGENCE OF EINSTEINIANS |
06 May 2007 02:36:10 AM |
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Pentcho Valev wrote:
http://en.allexperts.com/q/Astronomy-1360/speed-light-2.htm Steve
Carlip, a professor of UC Davis: "While GR does not require constant
c, neither does it prohibit constant c. In fact, recent experiments
have strongly indicate that gravity travels at c, thereby confirming
the constancy of c in GR."
Sorry, the wisdom belongs to Prof. James Gort, not to Steve Carlip.
Stive Carlip is the author of a different wisdom:
http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/speed_of_light.html
Steve Carlip: "Is c, the speed of light in vacuum, constant? At the
1983 Conference Generale des Poids et Mesures, the following SI
(Systeme International) definition of the metre was adopted: The metre
is the length of the path travelled by light in vacuum during a time
interval of 1/299 792 458 of a second. This defines the speed of light
in vacuum to be exactly 299,792,458 m/s. This provides a very short
answer to the question "Is c constant": Yes, c is constant by
definition!"
Pentcho Valev
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| User: "Androcles" |
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| Title: Re: THE INCREDIBLE INTELLIGENCE OF EINSTEINIANS |
06 May 2007 04:27:19 AM |
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"Pentcho Valev" <pvalev@yahoo.com> wrote in message =
news:1178436970.952619.44680@n59g2000hsh.googlegroups.com...
Pentcho Valev wrote:
http://en.allexperts.com/q/Astronomy-1360/speed-light-2.htm Steve
Carlip, a professor of UC Davis: "While GR does not require constant
c, neither does it prohibit constant c. In fact, recent experiments
have strongly indicate that gravity travels at c, thereby confirming
the constancy of c in GR."
=20
Sorry, the wisdom belongs to Prof. James Gort, not to Steve Carlip.
Stive Carlip is the author of a different wisdom:
=20
=
http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/speed_of_li=
ght.html
Steve Carlip: "Is c, the speed of light in vacuum, constant? At the
1983 Conference Generale des Poids et Mesures, the following SI
(Systeme International) definition of the metre was adopted: The metre
is the length of the path travelled by light in vacuum during a time
interval of 1/299 792 458 of a second. This defines the speed of light
in vacuum to be exactly 299,792,458 m/s. This provides a very short
answer to the question "Is c constant": Yes, c is constant by
definition!"
=20
Pentcho Valev
He's right there, the definition of c is 2AB/(t'A-tA) =3D c =3D 0/0, =
whereas
the speed of light, s, is 299,792,458 m/s relative to the source.
'c' is not the speed of light, 's' is.
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