Article View: sci.physics
Article #1501Re: Relativity
From: Cameron Randale Bass
Date: Sun, 26 Jul 1992 01:04
Date: Sun, 26 Jul 1992 01:04
64 lines
4013 bytes
4013 bytes
In article <9969@sun13.scri.fsu.edu> jac@ds8.scri.fsu.edu (Jim Carr) writes:
>In article <9207251756.AA07822@Ra.MsState.Edu> rsf1@RA.MSSTATE.EDU (Robert S. Fritzius) writes:
>>
>>In article <1992Jul22.150401.15820@news.endg.convex.com> Steve Warren
>>writes:
>>
>>>...When particles get zinging around near c in, say, the Bevatron
>>>here at Berkeley, not only does it require more enery to accelertate
>>>them, but when they smash into something (...) the energy released
>>>is significantly *more* than can be accounted for by the particles
>>>rest mass...
>
>More importantly, the momentum (hence the magnetic field required to
>bend the beam) is seen to increase even though the speed does not.
I am not sure this is a big problem in this context. One could
always claim that the field holds the momentum (which it clearly
does sometimes). You've localized a bit of it near the particle
and the magnets are just augmenting it everytime they try to
give the particle a whack. You get radiation when a bit of
this localization tries to continue on the straight course it
loves. The particle itself, of course, sees little of this
since everything you send it is extremely doppler-shifted to
low energy in its local frame.
>>Perhaps for mesons there is a velocity related dwell-time factor
>>at work in their decay mechanism in addition to (or rather than) a
>>time-dilation effect.
>
>It would be rather curious to see how you would get *exactly* the
>non-linear relationship predicted by relativity and observed in
>experiment, in particular the same factor as one gets for the mass...
I don't think that the mass is a problem. It works out just fine if you
take a fixed beast spitting particles at nearly c with respect to
the beast accelerating them using something electromagnetic fixed
to the beast. One would be hard pressed to object since we don't know
what the mass is anyway, just how hard it slams into the target
(usually interacting electromagnetically as well, though not always).
The big problem is that if you assume an underlying galilean transform,
there is no physical time dilation. One could explain away apparent
time dilations, but half-lives seem very difficult to handle
unless you assume either a) we are wrong about where the particle is
b) somehow, high velocity with respect to a given frame changes
the half-life. Neither is a very appealing option, to say the least.
There are a number of little problems, but the guy in question
died before he could work out anything more than a basic skeleton
of a response to Lorentz's theories. Also, he did it mostly to
show that there was another way of looking at these things. However
science passed Ritz and the work by. Seems a shame that a man who has
a widely used mathematical technique named after him (since he
developed it) and was one of the major inspirations for the development
of Schroedinger's wave mechanics does not merit a mention in any of
the major encyclopedias, and rarely merits mention in any of the
major scientific biography compilations.
dale bass
--
C. R. Bass crb7q@virginia.edu
Department of Mechanical and Aerospace Engineering
University of Virginia
Charlottesville, Virginia (804) 924-7926
Technical Details
Message-ID:
<1992Jul26.010454.8489@murdoch.acc.Virginia.EDU>Path:
arc1-ca.pugleaf.net!sparky!uunet!gatech!concert!uvaarpa!murdoch!kelvin.seas.Virginia.EDU!crb7qReferences:
<9207251756.AA07822@Ra.MsState.Edu> <9969@sun13.scri.fsu.edu>Show Full Headers
Complete Article Headers
Newsgroups: sci.physics Path: arc1-ca.pugleaf.net!sparky!uunet!gatech!concert!uvaarpa!murdoch!kelvin.seas.Virginia.EDU!crb7q From: crb7q@kelvin.seas.Virginia.EDU (Cameron Randale Bass) Subject: Re: Relativity Message-ID: <1992Jul26.010454.8489@murdoch.acc.Virginia.EDU> Sender: usenet@murdoch.acc.Virginia.EDU Organization: University of Virginia References: <9207251756.AA07822@Ra.MsState.Edu> <9969@sun13.scri.fsu.edu> Date: Sun, 26 Jul 1992 01:04:54 GMT Lines: 64