Re: Gravitational Electrical Effects
Posted by Uncle Al on Jul 17, 2003 at 09:36
(68.5.243.16)Re: Gravitational Electrical Effects (Gurudatt Shenoy)
"Unified Field Theory : All our compartmentalized concepts of time, space and matter energy are not seperate entities but are tansmutable under the same conditions of electromagnetic disturbance."
Bullshit. Not even if you are wearing your Kaluza-Klein jeans. That you would state so declares a profound ignorance of mathematics and physics (plus your inability to use a spell checker).
1) Short form: You cannot self-consistently unify axiomatic theories with incommensurate founding postulates.
Planck's constant (h, enforces uncertainty in measurement; h-bar is the fundamental unit of action), Newton's constant (Big G, scales gravitation), and lightspeed (c, enforces information transfer delay) define physics:
? h=h G=G c=infinity
mechanics,
electrostatics: h=zero G=zero c=infinity
classical physics: h=zero G=G c=infinity
quantum mechanics: h=h G=zero c=infinity
special relativity: h=zero G=zero c=c
general relativity: h=zero G=G c=c
quantum field theory: h=h G=zero c=c
Theory of Everything,
Grand Unified Theory: h=h G=G c=c
2) Long form. You are ignorant of basic physics.The source of monopole radiation is a changing monopole moment for a charge q or for a mass m. Since charge and mass are conserved, there can be neither monopole electromagnetic radiation nor monopole gravitational radiation.
The source of dipole radiation is a changing dipole moment. (Punctiliously, you need a second time derivative of the dipole moment.) For a pair of charges
d = qr + q'r'
and there's nothing special about the derivatives. For a pair of masses, the gravitational dipole moment is
d = mr + m'r'
and its time derivative is
mv + m'v' = p + p'
By conservation of momentum the second time derivative of the gravitational dipole moment is zero, and you can go to a center of momentum frame and set the first derivative to zero as well. There is no gravitational "electric dipole" radiation.
Consider the analog of "magnetic dipole" radiation. The gravitational equivalent of the magnetic dipole moment for a pair of charges is
M = mv x r + m'v' x r'
("x" is the cross product, "mv" is the "mass current")But M is the total angular momentum, which is also conserved. There is no gravitational "magnetic dipole" radiation.
The next moment up is quadrupole, with no relevant conservation laws, so gravitational quadrupole radiation is permitted. You can use this argument to advocate that gravity must be a tensorial (spin-2) interaction. Electromagnetism is mediated by spin-1 photons.
--
Uncle Al
http://www.mazepath.com/uncleal/eotvos.htm
(Do something naughty to physics)