Dec 13, 2015 · The radius of the observable universe is about 46 billion light years, which is considerably greater than its age of about 14 billion years.

May 13, 2023 · Usually states and observables are treated as fundamentally different entities in quantum theory. But are they really different? Yes, they are different. There are basic observables …

Dec 29, 2019 · 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, …

Mar 16, 2024 · The observable universe is the region from which light has had time to reach us since the Big Bang; it therefore has a finite radius and finite volume. By contrast, the term universe in its …

Jan 28, 2018 · The discussion revolves around the distinction between the observable universe and the entire universe, exploring concepts related to cosmology, the Big Bang, and the implications of …

Oct 24, 2020 · The discussion revolves around the concept of the "observable universe" and its implications for different observers located in various parts of the universe. Participants explore the …

Sep 6, 2021 · This discussion critically examines the role of non-observable assumptions in physical theories, particularly in quantum mechanics (QM) and relativity. It highlights that while theories often …

Nov 7, 2018 · The Born rule states that if an observable corresponding to a self-adjoint operator with discrete spectrum is measured in a system with normalized wave function (see Bra–ket notation), then

Apr 1, 2015 · The discussion revolves around the sizes of the observable and unobservable universe, particularly in the context of cosmic inflation and the implications of the universe's accelerating …

Jan 27, 2018 · In the cosmology section of the Physics Forums, I encountered many Big Bang and related infinity problems. Hence, in this article, I want to explain the Big Bang, the topology of the …