## Amplitude

### Half the difference between the minimum and maximum values of the range. Radius of the range.

In physics, amplitude is a term used to refer to the maximum displacement or distance of a wave from its rest position (equilibrium point), usually in reference to a sine wave. It is a measure of the strength, intensity, or magnitude of the wave.

For example, if we consider a sound wave, the amplitude determines the volume or loudness of the sound. The greater the amplitude, the louder the sound. Similarly, in an electromagnetic wave, the amplitude determines the brightness of light or the strength of the electric and magnetic fields.

The amplitude of a wave can be measured in different units, depending on the type of wave. For a sound wave, it is measured in decibels (dB). For an electromagnetic wave, it is measured in volts or watts per meter squared (W/m²). In general, the unit of amplitude is typically the same as the unit of the quantity being measured.

Amplitude can also be used in the context of simple harmonic motion, such as the oscillation of a pendulum. In this case, the amplitude refers to the maximum displacement of the pendulum from its equilibrium point.

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