# What does the amplitude of a wave measure?

The amplitude of a wave refers to the maximum amount of displacement of a particle on the medium from its rest position. In a sense, the amplitude is the distance from rest to crest. Similarly, the amplitude can be measured from the rest position to the trough position.

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Simply so, what does amplitude of a wave mean?

Amplitude, in physics, the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.

Likewise, what does the amplitude of a light wave determine? In astronomy, amplitude of a light’s wave is important because it tells you about the intensity or brightness of the light relative to other light waves of the same wavelength. It’s a measure of how much energy the wave carries.

In this way, how do you find the amplitude of a wave?

Amplitude is generally calculated by looking on a graph of a wave and measuring the height of the wave from the resting position. The amplitude is a measure of the strength or intensity of the wave. For example, when looking at a sound wave, the amplitude will measure the loudness of the sound.

What happens when you increase the amplitude of a wave?

The sound is perceived as louder if the amplitude increases, and softer if the amplitude decreases. This is illustrated below. The amplitude of a wave is related to the amount of energy it carries. As the amplitude of the sound wave increases, the intensity of the sound increases.

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