KnowraReduced massLinked fromLinked fromThe 11 pages that link to Reduced mass, each with the reason it gives.All 11Related 9Compared with 2Center of massRelated: Separating two-body motion into center-of-mass and relative motion introduces this effective mass.Molecular vibrationRelated: For a diatomic molecule, reduced mass helps set its vibrational frequency alongside bond stiffness.Two-body problemRelated: It replaces both bodies’ inertias in the equivalent one-particle equation.Rydberg formulaRelated: Including the nucleus’s motion refines the Rydberg constant for each isotope.Rydberg constantRelated: Accounting for nuclear motion changes the hydrogen Rydberg constant from its infinite-mass value.Hydrogen-like atomRelated: Including nuclear recoil replaces the electron mass in accurate hydrogen-like energy calculations.Bohr radiusRelated: Using it accounts for the proton’s motion in the hydrogen atom.ProtiumRelated: The electron–protium reduced mass helps determine hydrogen’s spectral frequencies.Atomic and molecular collisionsRelated: It determines how much relative kinetic energy corresponds to a given collision speed.