*Post by Jan VR*Hi Ken,

*Post by Ken S. Tucker*It's a no-brainer getting the Schwarzschild metric once

you know the answer, in fact it's rather easy to derive

from E =hv (Plancks photon energy equation), once you

prove "h" is invariant,

Can you show me how ?

Well this is a start....

Begin with a massless lightbulb, and measure

the intensity of the bulb at various distances

using a 1 meter^2 receiver, basically measuring

light energy flux.

Well we know the photon intensity on the meter^2

is proportional to 1/r^2 in Newtonian physics.

In the early 1900's Planck established E=hf

(E=energy, h= constant, f=frequency).

Because of conservation of energy, light rays

(photons) going upward in a g-field, must loose

frequency, aka the Einstein shift. This gets

the metric g_00.

So now if we place a large mass M where the bulb

is, the intensity will reduce where the receiver

is, compared to when M=0 because of the *red shift*

of photons moving upward due to mass M>0.

To get the same photon intensity as when M=0,

the reciever will need to be set closer to the

M>0 bulb. That is why radial *length* shrinks

in a g-field, (g_11).

The Newtonian coordinates to retain the

conservation of energy are replaced by the KS,

coordinates accounting for E=hf in a g-field.

For ref see Weinberg's "Grav & Cosmo" pg. 84,

beginning with "Incidentally...", it's

uncredited, but I think reliable.

Jan, I think that will appeal to your "Nuclear Physics"

instincts.

Regards

Ken

General Relativity Theory (GRT) is like a legal document,

and because of General Covariance is written in the

language of tensors, and may well be the toughest

legal document ever written.

I agree with your sentiment that General Relativity

(apart from GRT) is quite understandable using High

School algebra, that's laudable, and in simple situations

works well enough.

Because gravity is such an overwhelming phenomena

it probably deserves your attention.

Ken