Rayleigh may refer to: Science Rayleigh scattering Rayleigh–Jeans law Rayleigh waves Rayleigh (unit), a unit of photon flux named after the 4th Baron Rayleigh Rayl, rayl or Rayleigh, two units of specific acoustic impedance and characteristic acoustic impedance, named after the 3rd Baron Rayleigh Rayleigh criterion in angular resolution Rayleigh distribution Rayleigh fading Rayleigh law on low-field magnetization Rayleigh length Rayleigh number, a dimensionless number for a fluid associated with buoyancy driven flow Rayleigh quotient Rayleigh–Ritz method Plateau–Rayleigh instability explains why a falling stream of fluid breaks up into smaller packets Rayleigh–Taylor instability an instability of an interface between two fluidsTitle of nobility Baron Rayleigh Charlotte Mary Gertrude Strutt, 1st Baroness Rayleigh John William Strutt, 3rd Baron Rayleigh, physicist, winner of a Nobel Prize in 1904 Robert John Strutt...