PhysicsChapter 3: Waves
Amplitude
Introduction
Amplitude is the maximum displacement of a vibrating particle from its equilibrium position. It shows how large the oscillation is. For a transverse wave, amplitude is often measured from the equilibrium line to a crest or trough.
Definition
Energy and Amplitude
For many waves, greater amplitude means greater energy transfer. In simple wave systems, energy is often related to the square of amplitude: **Energy ∝ A²**
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Review the key facts, formulas and checks before you move on.Amplitude
Sticky Notes · Quick Revision
A
- Maximum displacement
NOT
- Wavelength
CREST→TROUGH
- 2A
60-second revision
- Amplitude = maximum displacement.
- Larger A → generally more energy.
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