SEARCH Articles Figures Tables Approximation methods Rayleigh variational principle Configuration-interaction theory Rayleigh method Forced Rayleigh scattering method Forced Rayleigh scattering method measurement Laser Induced Fluorescence (LIF) and Scattering Method (Lorenz-Mie, Rayleigh, Raman) Method Rayleigh-Ritz approximation Method perturbation, Rayleigh-Schrodinger Rayleigh Ritz energy method Rayleigh interference method Rayleigh quotient method Rayleigh-Ritz method Rayleigh-Ritz variational method Rayleigh-Schrodinger perturbation theory method Rayleigh’s method The Rayleigh-Ritz method for Dirac Hamiltonians