Fr.: physique des ultra-sons
The branch of physics dealing with elastic waves of frequencies above 20 kHz to 1010 kHz propagated in solids, liquids, and gases.
mekânik-e mowji (#)
Fr.: mécanique ondulatoire
One of the forms of quantum mechanics, due to Louis de Broglie and extended by E. Schrödinger. It originated in the suggestion that light consists of corpuscles as well as of waves and the consequent suggestion that all elementary particles are associated with waves.
Fr.: optique ondulatoire
The branch of optics that analyzes the electromagnetic radiation in terms of its wave characteristics. Also called → physical optics.
zeroth law of thermodynamics
qânun-e sefrom-e garmâtavânik
Fr.: loi zéro de la thermodynamique
Two objects that are in → thermal equilibrium with a third object will be in thermal equilibrium with each other.