Natural Science Forum / Physics / Relativity / July 2008

As we speak they still propagate that space around the sun an earth
is curved
But what does they mean, really, they use words they dont understand
in their mythology

(c+v+c-v)/2 = c
The speed of light c is considered to be a constant since at least
Maxwell. However, Michelson and Morley, in the mathematics underlying
their interferometer experiment (MMX) to find evidence of the ether,

MOND lacks inner regime. Inner regime is
the relativistic regime for short scales.
Let's endow MOND with an inner regime.
Postulate 1: Upper and lower bound for velocities

//For your perusal://
General relativity applied to an expanding universe supports two
obvious sorts of curvature horizon: cosmological horizons and
gravitational horizons. It might be nice if we could topologically

If vacuum has both permittivity and permeability, than that implies
directly that you can
1. Magnetize vacuum - follows that vacuum becomes a permanent magnet
2. Vacuum is a dielectric - follows that vacuum becomes a capacitor

A new version of the FAQ "Does mass increase with speed?" was written and is
now online at
http://math.ucr.edu/home/baez/physics/Relativity/SR/mass.html
This is a well written article on this whole relativistic mass thing. The

"Strich 9" <Strich.9.2af7567@physicsbanter.com> wrote in message news:Strich.9.2af7567@physicsbanter.com...

Muon hoaksy poaksy
Special relativity asserts that space muons enjoy a prolonged life due
to their speed at near the speed of light and because of the effects
of time dilation. This is a fallacy. Muons are at rest in their frame

"A Snapshot of a Photon"
    The photon has been viewed as a somewhat mysterious entity which
sometimes has the properties of a particle and sometimes has the properties
oaf a wave. It would seem interesting to see, therefore, whether we can

I have been looking over the following three links for Foldy-Wouthuysen
transformation from the Dirac-Pauli to the Newton-Wigner representation
of Dirac's equation:
The first shows the calculation itself of this transformation:

The Constancy of Metres and Seconds
Before we accept the contraction hypothesis of Lorentz we must ask a
few questions. The hypothesis states that objects capable of motion
such as cars, planes or satellites contract in their length parallel

Universal Velocity １ (continued from "Beautifil Formula")
In the process of getting beautiful formula (6), I noticed the
existence of universal velocity. What does it mean?
To be simple, we think two inertial coordinate frames S1(x1,t1) and