An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The transference of energy through a body, without visible motion of any part of the body. → induction; → reduction; → subduction; → transduction.

Verbal noun from → conduct.

An electron whose energy lies in the conduction band of a solid, where it is free to move under the influence of an electron field.

→ conduction; → electron.

In the energy spectrum of a solid, a range of energies in which electrons can move freely under the influence of an electrical field. Metals have many electrons in this range, insulators have none. In semiconductors the conduction band contains few electrons provided by impurity atoms or ejected from the valence bands by thermal energy or photon absorption.

→ conduction; → bande.

A type of → heat transfer by means of molecular agitation within a material without any motion of the material as a whole.

→ heat; → conduction.

A process that occurs in a medium where a → temperature gradient exists: dQ = -κ(dT/dx)dA.dt, where dQ is the amount of heat passing through the time dt across an area dA in the direction of the normal x to this area and toward the reduction in temperature, κ is the → thermal conductivity, and (dT/dx) the temperature gradient.

→ thermal; → conduction.