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==Key Stage 3==
===Meaning===
[[File:Amplitude.png|right|300px|thumb|This diagram shows the [[amplitude]] of a [[wave]].]]
The [[amplitude]] of a [[wave]] is the distance between the peak of a [[wave]] and the midpoint of the [[wave]].
*[[Sound]] - The louder the [[sound]].
*[[Water Wave]] - The taller the [[wave]].
{| class="wikitable"
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|[[File:OscilloscopeScreen4.png|center|200px]]
|[[File:OscilloscopeScreen5.png|center|200px]]
|[[File:OscilloscopeScreen6.png|center|200px]]
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| style="height:20px; width:200px; text-align:center;" |This is a high [[amplitude]] [[wave]] shown by the large [[displacement]] between the peak (or trough) of the [[wave]] and the [[Equilibrium Position|equilibrium position]].
| style="height:20px; width:200px; text-align:center;" |
| style="height:20px; width:200px; text-align:center;" |This is a low [[amplitude]] [[wave]] shown by the small [[displacement]] between the peak (or trough) of the [[wave]] and the [[Equilibrium Position|equilibrium position]].
|}