Higher Dimensions: Beyond Our Perception
What Physicists Mean by a Higher Dimension Higher dimensions are proposed spatial directions beyond the three we move through. Physics treats them seriously: Kaluza-Klein theory added one in 1921, string theory needs six more, and M-theory needs seven. None has been detected. Tabletop gravity tests and the Large Hadron Collider keep narrowing where they could […]
The Many-Worlds Interpretation: Quantum Reality and the Branch-Splitting Universe
What Is the Many-Worlds Interpretation of Quantum Mechanics? The Many-Worlds Interpretation is a 1957 formulation of quantum mechanics by Hugh Everett III that takes the wavefunction as ontologically real and lets it evolve unitarily without collapse, so each measurement outcome corresponds to a real branch of a single universal quantum state. It is one of […]