amplitude

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am·pli·tude / ˈampliˌt(y)oōd/ • n. 1. Physics the maximum extent of a vibration or oscillation, measured from the position of equilibrium. ∎  the maximum difference of an alternating electrical current or potential from the average value. 2. Astron. the angular distance of a celestial object from the true east or west point of the horizon at rising or setting. 3. breadth, range, or magnitude: the amplitude of the crime of manslaughter lies beneath murder. 4. Math. the angle between the real axis of an Argand diagram and a vector representing a complex number.

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amplitude (ăm´plĬtōōd´), in physics, maximum displacement from a zero value or rest position. In the harmonic motion of a pendulum, the amplitude of the swing is the greatest distance reached to either side of the central rest position. Amplitude is important in the description of a wave phenomenon such as light or sound. In general, the greater the amplitude of the wave, the more energy it transmits (e.g., a brighter light or a louder sound).

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amplitude
1. Of a fold, the height of the maximum displacement of a folded layer measured from a median trace which passes through the inflexion points of adjacent limbs.

2. Of a wave, the distance between the highest point of the wave and the position of zero displacement.

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amplitude See signal.