The Nature of Reality

acceleration According antimatter antiparticles appear astronomers atom baryons behavior big bang theory billion Bohr calculate cause cles concept confirmed constituents contained Copenhagen interpretation created dark matter decay density dimensions Dirac discovered discovery distance earth Einstein electric charge electromagnetic electron emitted energy ether example exist expansion experiment experimental explain fact force galaxies gravitational helium hypothesis idea imply infinite inflationary universe theory interaction J. J. Thomson kind leptons light magnetic field many-worlds interpretation mass mathematical measure mesons momentum motion moving nature negative neutrino neutron Newton's nuclear nucleus objects observed orbit phenomena physicists Planck planets possible predictions problem proton quantities quantum electrodynamics quantum field theory quantum mechanics quarks questions radiation reason result scientific scientists seemed shadow matter space space-time special relativity special theory speculation spin stars subatomic supergravity theories theoretical theory of relativity thing Thomson tion uncertainty principle velocity virtual particles wave wavelengths