The Speed of Light May Not Be Constant

[Kraker]

Einstein's theory of relativity established the speed of light (299,792,458 meters per second) as a universal constant. However, some recent cosmological observations and theoretical models suggest this speed might be very slightly variable over vast distances and across time.

Question: If the speed of light isn't truly constant, what does that mean for our understanding of the universe and the laws of physics? Could it explain some of the mysteries we still face in cosmology, like dark energy or the accelerated expansion of the universe?

 

[zakie]

The speed of light may not be constant, potentially varying under certain conditions.

 

[Kath_]

The speed of light throwing us a curveball? That's like the cosmic equivalent of discovering that your favorite constant isn't so constant after all!