Quote:
Originally Posted by sjastro
a particle, metric expansion causes the wave to stretch out.
The result is that the spectal lines of distant objects are displaced to the red end of the spectrum.
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That makes sense.
Redshift means we observe lower frequency of incoming light - however also everything else must slow down (supernova light curve decay rate). Does this slowing down correspond in amount to calculated time dilation? Or there is (much) more to the whole story?