- #1
zrek
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- TL;DR Summary
- I'm looking for argues how the scientists figured out that the strecthing spacetime causes the redshift and not other possible explanations.
The space expands due the dark energy, so the light wavelength also stretches during its journey between galaxies, causing a measurable redshift.
How can I argue that this is the right reasoning for the measured redshift? What if someone states that the photon maybe simple loses its energy over long distances, so this is why its wavelength increases? Is there some evidence against this approach?
How can I argue that this is the right reasoning for the measured redshift? What if someone states that the photon maybe simple loses its energy over long distances, so this is why its wavelength increases? Is there some evidence against this approach?