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

An → interference process in which the → amplitude of the resultant wave is greater than that of either individual waves. See also → destructive interference.

Constructive, from M.Fr. constructif or from M.L. constructivus, from L. construct-, p.p. stem of construere "to heap up," from → con- + struc- variant stem of struere "to build," → structure; → interference.

Andarzaneš, → interference; sâzandé "constructive," from sâxtan, → structure.

An → interference process in which the → amplitude of the the amplitude of the resultant wave is less than that of either individual waves. See also → constructive interference.

Destructive, from O.Fr. destructif, from L.L. destructivus, from destruct-, p.p. stem of destruere, from → de- + struere "to build," → structure; → interference.

Andarzaneš, → interference; virângar "destructive," from virân, "destroyed, ruined."

Physics: To cause → interference.

Interfere, from M.Fr. entreferer "to strike each other," from entre, → inter-, + ferir "to strike," from L. ferire "to knock, strike."

Andarzadan, from andar, → inter-, + zadan "to strike, beat," from Mid.Pers. zatan, žatan; O.Pers./Av. jan-, gan- "to strike, hit, smite, kill" (jantar- "smiter"); cf. Skt. han- "to strike, beat" (hantar- "smiter, killer"); Gk. theinein "to strike;" L. fendere "to strike, push;" Gmc. *gundjo "war, battle;" PIE *g^when- "to strike, kill."

The phenomenon occurring when two or more waves of the same → frequency having a constant → phase difference traverse simultaneously in the same region of a medium and cross each other. In the region of superposition, the the resulting wave intensity is different from the sum of intensities due to individual waves at that point. This phenomenon proved the validity of the wave theory of light. See also → constructive interference, → destructive interference, → interference fringe, → Young's experiment, → wave theory of light.

Interference, from → interfere + -ence a noun suffix equivalent to -ance, corresponding to the suffix -ent in adjectives.

Andarzaneš, verbal noun of andarzadan, → interfere.

A filter that uses the phenomenon of optical interferences between plane-parallel semi-transparent reflectors to transmit light selectively over a narrow wavelength band.

→ interference; → filter.

One of the alternating bright or dark bands produced by optical interference.

→ interference; → fringe.

→ order of interference.

→ interference; → order.

A wave pattern that results when two or more waves interfere with each other, generally showing → interference fringes. In acoustics, the interference pattern appear as the effect of → beats.

→ interference; → pattern.

A whole number which characterizes a particular position of an interference fringe according to whether there is interference arising from one, two, three, etc. wavelength difference of path. Same as → interference order

→ order; → interference.