radiation


n. The act or process of radiating: the radiation of heat and light from a fire.

Physics

    1. Emission and propagation and emission of energy in the form of rays or waves.

    2. Energy radiated or transmitted as rays, waves, in the form of particles.

conduction


2.

Physics.

a.

the transfer of heat between two parts of a stationary system, caused by a temperature difference between the parts.



convection

1.

Physics. the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.