(November 10, 2014 at 11:39 am)Pickup_shonuff Wrote: Now that I'm onto A Universe From Nothing by Lawrence Krauss, two additional questions:I'm guessing the question is "does a universe from nothing makes sense?"
1. Does the following question make sense?
I haven't read Krauss's book, so I don't know exactly his argument. However, there two observations that make me think it is possible.
The first is general relativity's basic principle that mass distorts spacetime. Is the opposite true that distorted spacetime makes mass? If it is, then fluctuations in spacetime creates mass.
Second, we know that particles and their exact opposite pop out of quantum vacuum and disappear, i.e. virtual particles. Some will argue that the quantum vacuum is something, but I don't buy their arguments. To make the quantum vacuum into something is to bring another aether theory. In my opinion, these virtual particles demonstrate the instability of nothing. So a particle and it's exact opposite can pop into existence and before the pop back into nothing one of the particles decays into 3 particles. So the original particles can't recombine back to get nothing. Tada, something from nothing.
I will admit that my ideas still have some holes in them. And the first and second reasons have some contradictory statements. I haven't yet spend too much time refining them.
Quote:2. How do physicists know that the "hot" and "cold" spots in the cosmic microwave background radiation are sub-Planck length quantum fluctuations magnified by inflation if such ultra-microscopic regions of empty space are far beyond the technological limits of observation?
First, the maximum starting size of the universe is a Planck length because the uncertainty principle (what effectly allows for the existence of virtual particles) allows gravity poping into existence.
Second, the Planck length is by no means the smallest unit of distance. The Planck length is the smallest distance that can be measured. The expansion of the universe is not a measurement.
So the starting size of the universe being a Planck length and then expanded to something much bigger is just magnifing what was going on inside.