Q. How do we know that the universe expansion is really the explaination for the observed redshift of light from stars.
As i understand it, space is a quantum soup of virtual particles. Shouldn't these virtual particles able to absorb light energy?
is it possible the magnetic and electric permeability of free space is changing over time? Wouldn't that change light waves in space?
Q. If one has crossed the event horizon of a black hole, is one traveling faster than light and thus going backward in time wrt the outside universe on the other side of the event horizon?
qoou t1_jaj6wnl wrote
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Many parts to this question:
Q. How do we know that the universe expansion is really the explaination for the observed redshift of light from stars.
Q. If one has crossed the event horizon of a black hole, is one traveling faster than light and thus going backward in time wrt the outside universe on the other side of the event horizon?