How much a radio wave moves back and forth is an example of its amplitude.
- the quality of being ample or the amount or degree to which a thing extends
- an amount that is more than enough; abundance; fullness
- scope or breadth, as of mind
- the angular distance of a star from the true east or west point of the horizon, at the moment of its rising or setting
- the extreme range of a fluctuating quantity, as an alternating current or the swing of a pendulum, generally measured from the average or mean to the extreme
Origin of amplitudeClassical Latin amplitudo ; from amplus: see ample
- Greatness of size; magnitude.
- Fullness; copiousness.
- Breadth or range, as of intelligence.
- Astronomy The angular distance along the horizon from true east or west to the intersection of the vertical circle of a celestial body with the horizon.
- Physics The maximum absolute value of a periodically varying quantity.
- Mathematics a. The maximum absolute value of a periodic curve measured along its vertical axis.b. The angle made with the positive horizontal axis by the vector representation of a complex number.
- Electronics The maximum absolute value reached by a voltage or current waveform.
Origin of amplitudeLatin amplit&umacron;d&omacron;, from amplus, large.
amplitude - Computer Definition
The extreme range, or magnitude, of a fluctuating value such as an acoustic or electromagnetic signal, amplitude is measured perpendicular to the to the time axis of a time-plot, i.e., frequency, of a sine wave. Amplitude is a measure of the intensity, loudness, power, strength, or volume level of a signal. In an electrical circuit operating on alternating current (ac), amplitude is measured as the Voltage (V) level and is expressed as +V and V, depending on the direction of the current. See also sine wave.