According to Genzel, does the speed of light change?
Yes, based on location
Yes, based on time
No, he says it's constant
He hasn't commented on this
Answer
No, according to Genzel, the speed of light is constant. This means that it does not change regardless of the motion of the observer or the source of the light.
Astrophysical Odyssey: Unraveling the Legacy of Reinhard Genzel