An Etymological Dictionary of Astronomy and Astrophysics

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.

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

Etymology (PE): Andarzaneš, verbal noun of andarzadan, → interfere.