Could Gravitational Redshift just be a conservation of energy ?

[sally]

Gravitational Redshift

 

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Could it be that the gravitational redshift is an obvious fact and can in no ways

 

be used to prove GR.

 

 

 

 

If we only use the following facts we can derive the gravitational redshift ;

 

1.The conservation of energy-matter.

 

2.The potential energy on earth PE=m*g*h (or that of a star G*M/r )

 

3.The energy of a photon E=h*f.

 

4.E=mc^2.

 

 

 

There are no other theories or facts that we need to prove the

 

gravitational redshift.

 

 

 

 

 

 

To show this we make a thought experiment with Alice and Bob.

 

 

 

Alice and Bill have decided to do something unhonest.

 

They want to break the first law of physics that prohibits

 

perpetual motion machines.Alice goes to the bottom of a

 

mountain and Bill to the top.

 

 

 

Alice will then convert 1kg of water to a laser light and flash

 

it up to Bill .Bill will then convert this laser light back to

 

water and let it flow down the mountain.They will then sell the

 

energy of the flowing water on the black market .

 

 

 

This is obviously wrong.

 

 

 

The reason is that the potential energy of the water must be

 

subtracted from the energy Bill can get from the light rays.

 

 

 

 

 

The energy before must be equals the energy afterwards.

 

 

 

Thus ;

 

 

 

The energy received must equal the energy emitted minus the

 

energy due to the potential energy of the water.

 

 

 

h*fo=h*fe-(h*fe/c/c)*g*h

 

 

 

This reduces to

 

fo=fe*(1-g*h/c/c)

 

 

 

This is Einstein's result and his derivation was probably equivalent.

 

The only difference is that over here I stress that all electromagnetic

 

radiation is by definition a conservation of energy-momentum that could be

 

deplaced in space.

 

see ;

 

http://uk.groups.yahoo.com/group/DynamicFT/

 

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[[Tycho?]]

Well.... yeah.

 

Thats the definition of gravitational redshift, that the EM radiation loses energy as it moves away from the mass.