sci.physics.electromag

On Tue, 18 Mar 2008 14:30:38 GMT, Tom Roberts
wrote:

>nade wrote:
>> http://redshift.vif.com/BookBlurbs/OldPhysics.htm
>> What do you make of it?
>
>The excerpt you posted is mostly nonsense.
>
>Specifically:
>> if we allow the detector to have free
>> motion, then the formalism of electrodynamics which follows
>> must somehow allow for the parameterization of the detector’s
>> motion.
>
>Sure. We know quite well how to do that -- the detector has a
>4-velocity, and the quantities it measures are basically the field(s)
>dotted into its 4-velocity.

Could you please provide a precise definition of the term '4-velocity'.




Henri Wilson. ASTC,BSc,DSc(T)
www.users.bigpond.com/hewn/index.htm

....specialising in teaching physics to engineers and mathematicians....