Re: coordinates and equations.
- From: rbwinn <rbwinn3@xxxxxxxx>
- Date: Sun, 30 Nov 2008 17:12:44 -0800 (PST)
On Nov 30, 2:45�pm, PD <TheDraperFam...@xxxxxxxxx> wrote:
On Nov 29, 9:00�am, rbwinn <rbwi...@xxxxxxxx> wrote:
On Nov 28, 6:52 pm, PD <TheDraperFam...@xxxxxxxxx> wrote:
On Nov 28, 2:46 pm, rbwinn <rbwi...@xxxxxxxx> wrote:
On Nov 28, 12:55 pm, PD <TheDraperFam...@xxxxxxxxx> wrote:
On Nov 28, 1:32 pm, rbwinn <rbwi...@xxxxxxxx> wrote:
On Nov 28, 9:20 am, PD <TheDraperFam...@xxxxxxxxx> wrote:
On Nov 28, 9:21 am, rbwinn <rbwi...@xxxxxxxx> wrote:
This is a simple way to think of coordinates for some of our
scientific friends. See, there is an x axis and a y axis and a
z axis. So if we have an equation that says
x^2 + y^2 + z^2 - c^2t^2 = 0
where x, y, and z are coordinates, and t is time on a clock in S, the
frame of reference, and c is the speed of light, then if you
substitute numerical values into the equation, what you end up with is
a sphere with a radius of ct with its center at the origin of S.
Now we will do the same thing with another set of coordinates S'.
(x')^2 + (y')^2 + (z')^2 - c^2(n')^2 = 0
where n' is the time on a clock in S'.
That's interesting, Bobby, but if you use t as a variable to denote
what a clock reads, then a more sensible notation is t for the time
read on a clock stationary in S, and t' for the time read on a clock
stationary in S'. If you prefer to use n' for the clock reading in S',
I suppose that's your prerogative. Would you care to use f'' for the
clock reading in S'', and u''' for the clock reading in S'''?
Well, you are getting a little ahead of the conversation, PD. Why
don't we just let individual people decide what veariables they will
use, since I am the only person who uses these variables anyway?
As I said, Bobby, it's your prerogative. I was just curious what you
were intending to use for the time variable as measured in S'', S''',
S'''', and so on.
Scientists have told us that
according to scientific experiments, light is traveling at c=300,000
km/sec according to a clock in S'. So what we end up with here is a
sphere with a radius of c(n') with its center at the origin of S'.
I hope this will help some of our scientific friends to understand
how light propagates. I know it is confusing to them because there is
no length contraction in these equations.
Certainly there is. What do you think the relationship between x and
x' is?
x'=x-vt
Did you think that length contraction would mean light wouldn't
propagate in a sphere with radius c x time?
Maybe it would help to learn what it is that relativity actually says,
Bobby.- Hide quoted text -
Well, according to Dr. Albert Einstein, the light would propagate in
S' as an oblate spheroid as seen from S because of the length
contraction.
I'd be curious where you think he says that. Einstein I believe made a
point of saying that light travels isotropically at c, regardless of
the motion of the source, and regardless of reference frame, which
would seem to fly counter to the notion that light would propagate in
an oblate spheroid.
Perhaps it would help if you had just an eensy bit better grip on what
Dr. Albert Einstein said.
Are you saying that Dr. Albert Einstein was wrong?
Robert B. Winn- Hide quoted text -
- Show quoted text -- Hide quoted text -
- Show quoted text -- Hide quoted text -
- Show quoted text -
Well, Dr. Einstein said that light would propagate as an oblate
spheroid in the moving frame of reference as seen from the frame of
reference at rest.
I already asked you, Bobby, where you think he says that.
He said it in his book, Relativity, the Special and General Theories.
Robert B. Winn
I don't believe that, Bobby, and I can't locate such a statement
anywhere in my copy.
Would you care to check again? Or is checking facts not really
necessary for you?
PD- Hide quoted text -
- Show quoted text -
Not necessary. Go ahead and believe whatever you want to believe.
Robert B. Winn
.
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