I believe all electromagnetic energy is light, but typically we use the word light to describe the spectrum visible to humans.James Clerk Maxwell’s equation proves that all forms of electromagnetic waves travel at the speed of light: why, then, still we say that light is the fastest thing in the cosmos?
You're right about light not being THE fastest thing in the universe, actually light moves at THE fastest speed possible in our universe.
Redshift affect explains why we can see galaxies up to roughly 46.8 billion lightyears away if I am not mistaken. Not sure what uproar you are speaking of the observable Universe is 13.8 billion years old (WHICH I WILL REITERATE FOR THE BILLIONTH TIME DOES NOT MEAN WHAT ANY OF YOU THINK IT DOES).Isn't that what has caused the uproar about seeing galaxies farther away than 18.8 billion light years away?
Correction: 46.5 billion lightyears. So I was wrong. Sorry about that. My fundamental point still stands, and I still don't understand your question yet I believe I have answered it.Isn't that what has caused the uproar about seeing galaxies farther away than 18.8 billion light years away?