Re: How Does Light "Know" How Fast to Travel?

From: Bill Hobba (bhobba_at_rubbish.net.au)
Date: 06/02/04 

Date: Wed, 02 Jun 2004 23:23:58 GMT

<jlee@ncsu.edu> wrote in message news:40BE46A7.8020007@ncsu.edu...
> Bill Hobba wrote:
> > "JLeeCforRP" <jleecforrp@aol.com> wrote in message
> > news:20040601203406.13966.00000228@mb-m18.aol.com...
> >
> >>>>What real physical affect does velocity have on the clock rate to
cause
> >
> > it
> >
> >>to slow down, since the slowing down of the clock's hands is a real
> >
> > physical
> >
> >>effect - RIGHT!
> >>
> >>JLee CforRP
> >>
> >>>None zero, zilch - not even acceleration does that see -
> >>>http://math.ucr.edu/home/baez/physics/Relativity/SR/clock.html.
> >>>
> >>>Bill
> >>>
> >>>
> >>Then I guess, according to you, there is no such thing as "Time
Dilation"
> >>(where velocity causes time to slow down in a moving frame as viewed
from
> >
> > a
> >
> >>still frame)
> >>
> >>- Better not let any SR hear you say that!
> >
> >
> > You said: 'What real physical affect does velocity have on the clock
rate to
> > cause it to slow down, since the slowing down of the clock's hands is a
> > real physical effect - RIGHT!' then say 'Then I guess, according to you,
> > there is no such thing as "Time Dilation" (where velocity causes time to
> > slow down in a moving frame as viewed from a still frame)'.
>
> JLee Cfor RP
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> There is a
> > difference between something actually happening and being viewed to
happen.
> > What happens is that SR says a person (instrument or whatever) will
measure
> > time as slower than a person 'at the clock'. There is a difference. Of
> > course crackpots are masters of such semantic twisting.
> >
> > Bill
> >
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> So please tell us, suppose a Rocket leaves Earth at a near light
> velocity (say 0.8c) and then turns around after 3 years of its traveling
> time(5 years of Earth time according to Einstein's time dilation)and
> then takes 3 years to return (at the same 0.8c velocity), meaning the
> Earth clock will read 10 years having passed, while the Rocket clock
> only reads 6 years, since: (1-0.8c^2/c^2)^1/2 = .6 (time dilation for
> rocket as compared to Earth at 0.8c velocity according to SR) when the
> rocket returns back to Earth. This is, of course, the familiar "Twin
> Paradox" we all know quite well.
>
> Now, suppose each twin has, sitting beside him, an ice cube that takes 8
> years to melt. According to SR only six years have passed on the rocket
> clock, meaning, according to the way the Earth twin "views" things, only
> six years of time have passed in the rocket frame, further meaning that
> the ice cube still has TWO years of "melt time" left.
> However, the Earth
> twin would, because he is a Relativist, find that 10 years had passed in
> his frame and that his ice cube has MELTED two years ago.
>
> Now the question I would like to ask you is:
> (and watch out how you answer this!)
>
> Did something "actually" physically happen to the "Rocket's" ice cube,
> as compared to what physically happened to the Earth's ice cube, to make
> it still have two hours of "melt time" left when the rocket returned to
> Earth, or did the Earth twin only "view" it to happen?
>
> I think maybe its time you start twisting semantics!

Crackpots and their supposed SR paradoxes. Nothing happened to the ice
cube, the clock or anything else other than the world line in space time
they followed. All that happened is that they followed different world
lines - like taking different paths from A to B records different distances.
See http://math.ucr.edu/home/baez/physics/Relativity/SR/acceleration.html,
http://math.ucr.edu/home/baez/physics/Relativity/SR/clock.html and
http://math.ucr.edu/home/baez/physics/Relativity/SR/TwinParadox/twin_paradox.html.
You obviously do not understand the theory you criticizing. Now answer me
this Mr Reality physics. When I rotate a rod what causes its x coordinate
to change? - some mytical force or incomprehensible workings? Of course
nothing of the sort causes it. It is simply how nature works. And it is
exactly the same with SR - they simply follow defend worldliness and when
you follow different worldliness and compare clocks or, any other time
dependant process for that matter, then they are found to be different,
simple as that. Nothing mytical involved - simply a need to understand the
concepts. However cranks believe their inability to understand it somehow
makes them correct. They are the ultimate brain dead egotists.

Bill

>
> all the best,
>
> J Lee CENTER for REALITY PHYSICS
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>
> >
> >
> >>>>all the best,
> >>
> >> Jeff Lee CENTER for REALITY PHYSICS
> >>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>
> >
> >
>

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