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

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

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

(medicine) The lowest pharmaceutical dosage required to cause effect in 50% of average individuals.

(physics) The increase in the wavelength, and corresponding decrease in the energy, of photons (especially of X-rays and gamma rays) when scattered by interaction with matter

The influence of suggestion on unconscious behavior, frequently used to explain dowsing and other seemingly supernatural claims.

(physics) The creation of excess electron-hole pairs, triggered by impinging beta particles.

(physics) the thermodynamic effect by which heat being passed through a thermocouple is converted into electricity

(physics) A thermoelectric effect which occurs when current is passed through a thermocouple, used in computing as a cooling process.

(physics) The emission of light (Cerenkov radiation) that occurs when a charged particle passes through an insulator at a speed greater than the speed of light in that medium; the characteristic blue glow from a nuclear reactor.