Re: Proper quantities in SR

"Sue..." <suzysewnshow@xxxxxxxxxxxx> wrote in message
news:1183547278.668037.243270@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jul 4, 5:37 am, "Jeckyl" <n...@xxxxxxxxxxx> wrote:
[...]

<< It is clear that dt = d_tau in the particle's rest frame.
Thus, d_tau corresponds to the time difference between
two neighbouring events on the particle's world-line, as
measured by a clock attached to the particle (hence,
the name proper time). According to Eq. (1422), the
particle's clock
----> appears <-----
to run slow, by a factor gamma(u), in an
inertial frame in which the particle is moving with velocity u.
This is the celebrated time dilation effect. >>
http://farside.ph.utexas.edu/teaching/em/lectures/node114.html
...Contrary to your arrogant assertions that something
more is afoot than a mere path delay
It is more than path delay .. it is NOT an illusion .. time runs
slower
in
relatively moving frames tha ones own frame.
Do you think time runs slower for for the pigeon racer?

J: << From the frame of someone not comoving with him, yes >>

Hint: Mass moving in one inertial frame has different
kinetic energy than equivalent mass moving relativly
to that frame.

Yes .. so?

That difference in energy is most easily represented
with an imaginary time because time is a symmetry
partner with energy.

Why are you stressing over kinetic energy being different .. that's just
classic physics

[snip some weird tangent again]

To say *time is different* in another frame or
the "clock really slows" is equivalent to thinking
Michael Jackson could live longer sleeping in
a big solenoid because the time is different there.

No .. one is physics .. the other is just plain scary

Do you really not undersatnd how time can be slower for an object in an iFoR
in which it is moving?

So the expressions "as judged from K" (Einstein) or
"appears to slow" (R. Fitzpatrick) are both correct
expressions and they don't seem be from some sort of
spooky or cranky web pages as you keep suggesting.

What are you on about .. what spooky pages?

[snip add for Uni of Texas]



.

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