(physics) The total expulsion of magnetic flux from the interior of a superconducting metal when it is cooled in a magnetic field below a critical temperature, near absolute zero, at which the transition to superconductivity takes place.

(of a drug, etc.) To become active; to become effective. / (of a law, etc.) To come into force, to come into effect, to inure.

(physics) the resonant and recoil-free emission and absorption of gamma rays by atoms in the solid state; the basis of a type of spectroscopy with applications in both physics and chemistry

(physics) The splitting of single spectral lines into three (or more) in the presence of a magnetic field.

(physics) the inelastic scattering of photons with subsequent change in frequency and phase; employed in Raman spectroscopy

(physics) The generation of an electric current in an intermetallic semiconductor in a magnetic field by the action of light.

(physics) The emission of electrons from the surface of a material following the absorption of electromagnetic radiation.

An artificially created or enhanced sound, used to accompany the action of a dramatic production, such as a film, play or video game

(physics) the magnetic self-attraction of parallel electric currents having the same direction; the restriction of a flowing plasma because of this attraction

(physics) the splitting and shift of a spectral line into several components in the presence of an electric field