What is Amplitude? Definition, Meaning & Example
The maximum displacement of a wave from its equilibrium position.
TL;DR: The maximum displacement of a wave from its equilibrium position.
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Amplitude: The maximum displacement of a wave from its equilibrium position.
Explanation
Amplitude measures how far a wave oscillates from its rest position. Greater amplitude means greater energy in the wave. For sound waves, amplitude determines loudness. For light waves, amplitude relates to intensity. Amplitude is independent of frequency. In water waves, amplitude determines wave height.
Example
When plucking a guitar string harder, the amplitude increases, producing a louder sound with the same pitch.
Frequently Asked Questions
What does amplitude measure?
Amplitude measures the maximum distance a wave oscillates from its central equilibrium position.
How does amplitude affect sound?
Greater amplitude produces louder sound, while smaller amplitude produces softer sound.
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