CMB : Long-Wavelength or Slow-Speed Light?

Feb 9, 2023
"CMB is a universal patchwork of long-wave radiation from the oldest light in the universe!"

"As light travels towards us from the distant galaxies, it is stretched over time by the ever expanding space it is travelling through. The longer it travels, the more the wavelengths are increased (reddened)."

At the same time cosmologists teach that space inside galaxies and galactic clusters does not expand at all (they reject the scenario in which expansion does occur inside galaxies and galactic clusters but is overcome by gravitational attraction):

"Is the space inside, say, a galaxy growing but overcome by the gravitational attraction between the stars? The answer is no. Space within any gravitationally bound system is unaffected by the surrounding expansion."

Sabine Hossenfelder: "The solution of general relativity that describes the expanding universe is a solution on average; it is good only on very large distances. But the solutions that describe galaxies are different - and just don't expand. It's not that galaxies expand unnoticeably, they just don't. The full solution, then, is both stitched together: Expanding space between non-expanding galaxies...It is only somewhere beyond the scales of galaxy clusters that expansion takes over."

So light is stretched as it travels in the space between galactic clusters, then stretching stops as the light enters a cluster, then stretching continues as the light leaves the cluster, etc.

This is so preposterous that no rational criticism is possible. The critic can only react hysterically ("But this is idiotic, don't you see?") and then he/she becomes crank, crackpot, troll, etc.

Richard Feynman: "I want to emphasize that light comes in this form - particles. It is very important to know that light behaves like particles, especially for those of you who have gone to school, where you probably learned something about light behaving like waves. I'm telling you the way it does behave - like particles. You might say that it's just the photomultiplier that detects light as particles, but no, every instrument that has been designed to be sensitive enough to detect weak light has always ended up discovering the same thing: light is made of particles." QED: The Strange Theory of Light and Matter p. 15

Whether Feynman is correct is not a matter of discussion here. I am just drawing the attention to a crucial implication. The concept of VARIABLE wavelength of light


is preposterous if "light is made of particles". That is, the particle model of light implies that the wavelength can only be an invariable proportionality factor in the formula

(speed of light) = (wavelength)(frequency)

And the formula says that, if the wavelength is constant, the so called cosmological (Hubble) redshift is due to the speed of light slowing down as photons travel through vacuum, in a non-expanding universe. CMB is, accordingly, very slow, highly redshifted light. This is not a totally unacceptable idea:

"Some physicists, however, suggest that there might be one other cosmic factor that could influence the speed of light: quantum vacuum fluctuation. This theory holds that so-called empty spaces in the Universe aren't actually empty - they're teeming with particles that are just constantly changing from existent to non-existent states. Quantum fluctuations, therefore, could slow down the speed of light."


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