Re: Natural Philosophy - It's challenge to SR
- From: "harry" <harald.vanlintelButNotThis@xxxxxxx>
- Date: Thu, 15 Mar 2007 16:43:10 +0100
"Tom Roberts" <tjroberts137@xxxxxxxxxxxxx> wrote in message
news:wpZJh.12856$uo3.12524@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
John Kennaugh wrote:
*something* physically controls the speed of light
What is it that "physically controls" a straight line to be the shortest
distance between two points? Can whatever it is be reasonably said to be
"physical"?
Good one. It could mean a line on paper. There the only physics involved is
the carbon of the pencil, and its coming into existence was not part of a
simple physical process. Or you could mean that the least atoms fit in a
straight row. Now that I'd indeed call a physical description of a straight
line. But the only "control" is in the sense that the atomic dimensions
determine that number -basically due to EM fields and electron mass.
I reject your notion that "something" "controls" that straight line, and
the speed of light is similar in SR/GR -- they are GEOMETRICAL, not
"physical".
Here I must agree with both Kennaugh and Einstein: (source-independent)
light propagation is impossible without a background on which it *does*
depend- ether, vacuum, whatever you want to call it. And note that geometry
is based on physics as it was constructed with atoms - not the other way
round!
Regards,
Harald
.
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