The Universe vs Observable Universe - Physics Forums The observable universe will correspond to the part of the sphere of the surface In the image, as you can see the Universe is just the surface of the sphere, but each observer on the sphere has its own observable universe
Radius of the Observable Universe in Light-years Is Greater than Its Age The radius of the observable universe is about 46 billion light-years, which is considerably greater than its age of about 14 billion years The radius of the observable universe is defined by the greatest distance from which light would have had time to reach us since the Big Bang, so you might think that it would lie at a distance of only 14
Learn Observables in Mathematical Quantum Field Theory - Physics Forums 2 (in the line below) The bosonic-observable component should be ## mathbf{Psi}^alpha ## instead of ##Pi## I think it is useful to add that the bosonic observable which originally is of even degree now is regarded as of odd-degree (so that ##theta mathbf{Psi}^alpha ## is of even degree), and this fact is made possible by Prop 3 51 Log in to
Hermitian operator lt;= gt; observable? - Physics Forums 'Observable' is simply a name; it means that there is an hermitean operator with real eigenvalues which can in principle correspond to results of measurements If you don't like this wording then you may call it 'hermitean operator' in order to make clear that a constructive approach for the measureemnt itself is missing
The observable and non-observable parts of the Universe - Physics Forums The observable universe, however, was smaller because there's a finite amount of stuff in it, and it was closer together Also, the observable universe is defined as the volume we can see, and light hadn't had time to travel so far
About non-observable assumptions - Physics Forums But to conclude that something is measurable observable (even indirectly and just in principle) because quantum theory declares it to be an observable would be misguided So the problem to distinguish between those observables of the theory that can actually be observed, and those which remain in principle unobservable remains, just like for
How many cubic planck lengths are in the observable universe? Because, since strings are smaller than a cubic plank length you can fit more them in a volume so, in your original statement "volume of universe divided by volume of Planck unit cube" (which is what I am asking about) would be let's say "ƒ" and if you that the "volume of the universe divided by volume of a string" would be greater than "ƒ" and let's call it "β" so β>ƒ
Is the Universe Finite, or Is It Infinite? - Physics Forums The observable universe refers to the portion of the universe that we can see or detect, limited by the finite time light has traveled since the Big Bang It has a finite volume It has a finite volume