Are gravity waves affected by the expansion of the universe in a similar fashion to light from extremely distant objects.
It wouldn’t be red shifted but not sure what other terminology to use.

Cymek said:

Are gravity waves affected by the expansion of the universe in a similar fashion to light from extremely distant objects.
It wouldn’t be red shifted but not sure what other terminology to use.

That’s a darn good question. My knee jerk reaction is “yes”, the wavelength increases with distance, the Doppler shift. I would guess that because gravity waves, like light, travel at the speed of light so I would expect the two to act similarly.

but

In GR, the fundamental differences between the equations that govern gravity waves and those that govern electromagnetic waves are as deep as the the difference between QM and GR. So they could act differently.

That said, let me now check the web. There seems to be some sort of consensus that gravity waves are indeed Doppler shifted.

(Oops, I should be saying “Gravitational waves” not “Gravity waves”, bad mollwollfumble)

Great question.