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 Originally Posted by OngBonga
Yes, but I had to watch the link above again research to remind myself what it was actually called. Doppler is easy to understand, lots of people understand the physics behind it, or at least will do if explained to them.
FYP.
What sets you apart from the average layman is that you don't think watching the link was "boring" or any synonym for "waste of time." You thought that part was interesting enough on its own to pursue. That's not how most people operate.
Originally Posted by OngBonga
I think the reason we don't see red and blue shift is because we're looking at x-rays... light of a very high frequency. For it to change colour, it needs to not be x-ray. This is the Doppler effect of light of a constant frequency.
What we're seeing is definitely red shifted by climbing up out of a deeper gravity well to get here than they fell back into once they got here. Not to mention the fact that the photons traveled through expanding spacetime to get here, which would also redshift.
X-Rays are still photons, and follow the same physics (Maxwell's Equations) as radio, microwave, visible or gamma rays.
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