[oneshtein]

Or by 24 thousand pairs orbiting 1 time per second, or by 24000*365*24*60*60 pairs orbiting 1 time per year.

> Also, gravitational waves don't redshift the photons, they change the length of the path the photons take.

Yep, more length to travel - larger wave length. :-/

> And as LIGO, NANOGrav etc., are relying on a prediction of the exact same GR equations that also lead to the big bang etc

I had a discussion about that recently. I have no power to repeat the discussion. You can find it in my comment history.

[ben_w]

> Or by 24 thousand pairs orbiting 1 time per second,

no, and for the same reason you can't use the output of a quarter million 2.45 Ghz microwave oven magnetrons to produce monochromic teal light (612500 Ghz).

The maths is basically equivalent for EM and gravity waves, except for the constants.

Well, that and the fact it's changing the space-time through which the waves themselves propagate, but the effect is usually small enough to be barely detectable even when you want to.

> Yep, more length to travel - larger wave length. :-/

no, same wavelength, going further on one half of the cycle, then not as far on the other half of the cycle. Same wavelength within the space, it's the space itself which changes.

> I had a discussion about that recently. I have no power to repeat the discussion. You can find it in my comment history.

TBH, that would be a colossal waste of my time. I'm only even bothering to reply to this this now because discussion is supposed to be helpful while I learn things.

[oneshtein]

> no, and for the same reason you can't use the output of a quarter million 2.45 Ghz microwave oven magnetrons to produce monochromic teal light (612500 Ghz).

Why we need monochromatic light? Gravitational wave background is just noise. A lot of orbiting objects in a galaxy will produce steady noise, due to interference. It's easy to check just by putting a bunch of wave generators with different frequencies in a same pond, and then move. Interference between waves will create noise with higher frequencies than original.

Even small effects are producing significant results over large periods of time. 1 billion years is 31.5E15 seconds.

If we integrate over all frequencies of gravitation noise floor, then we may have a number, which will explain a part of red shift.

More over, gravitational noise is important for Pilot Wave theory, because it may explain the source of energy for the pilot wave.

> no, same wavelength, going further on one half of the cycle, then not as far on the other half of the cycle. Same wavelength within the space, it's the space itself which changes.

It implies FTL speed at the second half of the cycle, which is impossible. If wavelength of light will be enlarged, then it will stay enlarged, because light traveling at c, so c-delta is possible, but c+delta is not.

> TBH, that would be a colossal waste of my time. I'm only even bothering to reply to this this now because discussion is supposed to be helpful while I learn things.

I have the same filling. I only reply because my pleasure to talk with you overcomes the inconvenience of Hacker News.

Maybe we should switch to email, or to a wiki with a proper set of tools for scientific discussion.