- (MATHEMATICS) In mathematics, amplitude means size or magnitude.
The origin of the word is the same Indo-European ple root that
gives us "plus" and "complement." The more immediate Latin source is amplus for wide. Today, "amplitude" is used to describe, among
other things, the distance a periodic
function varies from its central value, and the magnitude of a complex
- (PHYSICS) In physics, amplitude refers to the maximum departure
of a cyclical quantity from its mean value, i.e., the maximum height
of a wave peak or the maximum depth of a wave trough. The amplitude
of a pendulum is half the extent of
its swing. Amplitude modulation (AM) is a common method of encoding a carrier
wave in radio.
AND WAVE PHENOMENA
- (ASTRONOMY) One of the meanings of amplitude in astronomy is the difference between
the maximum and minimum magnitudes of a variable
star, i.e., the total range of its brightness.