Gravitational Waves - What Will Happen When Gravitational Wave Red-Shift?

[michaellee8]

What will happen when gravitational waves get strongly red-shifted like those in Doppler effect? Will it get even stronger amplitude or energy? Will it bend space-time more then it is red-shifted?

[exchemist]

What will happen when gravitational waves get strongly red-shifted like those in Doppler effect? Will it get even stronger amplitude or energy? Will it bend space-time more then it is red-shifted? 

The Doppler effect alters frequency, not amplitude. In the case of light, a Doppler effect alters the energy of the photons, by E=hν.

 

But this applies to the way EM radiation, specifically, is quantised. I do not know what the theory of quantisation of gravity (gravitons etc) has to say about the relationship between the energy of a graviton and the frequency of gravitational waves. Perhaps somebody else can comment on that. 

 

Your last question does not seem to make sense. A gravitational wave is itself a bending of spacetime into ripples. So the ripples are a result of a bending of spacetime, not the cause of it.

[Vmedvil]

The Doppler effect alters frequency, not amplitude. In the case of light, a Doppler effect alters the energy of the photons, by E=hν.

 

But this applies to the way EM radiation, specifically, is quantised. I do not know what the theory of quantisation of gravity (gravitons etc) has to say about the relationship between the energy of a graviton and the frequency of gravitational waves. Perhaps somebody else can comment on that. 

 

Your last question does not seem to make sense. A gravitational wave is itself a bending of spacetime into ripples. So the ripples are a result of a bending of spacetime, not the cause of it.

 

There is no model of the graviton being a spin 2 boson unlike a spin 1 boson the photon, but we do know them to have no rest mass like the photon. So, I would assume the same thing as a photon longer wavelength, but that is just me guessing.  ERROR 404.p "physics not found"

 

Edited October 7, 2017 by Vmedvil