- #1
robertjford80
- 388
- 0
I'm having trouble understanding the part in the Friedman equation where a'/a. I can't figure out why it's the derivative of a over a itself. If someone could give me some sort of analogy to something I already understand that would help. I'm pretty sure a is the rate at which the universe expands but not 100% sure. I've watched the Susskind lectures on Cosmology but he sort of glosses over that part.