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==Key Stage 5==
[[File:DiffractionSpot.png|right|300px|thumb|The [[Diffraction Pattern|diffraction pattern]] produced on a screen when [[monochromatic]] [[Visible Light|light]] passes through a circular hole.]]
===Meaning===
[[Diffraction]] is the spreading of [[wave]]s when they pass through a gap or around an obstacle.
{| class="wikitable"
|-
|[[File:SingleSlitDiffraction.png|center|200px|link=https://phet.colorado.edu/sims/html/wave-interference/latest/wave-interference_all.html]]|[[File:DoubleSlitDiffraction.png|center|200px|link=https://phet.colorado.edu/sims/html/wave-interference/latest/wave-interference_all.html]]
|-
| style="height:20px; width:200px; text-align:center;" |This image shows a plan view of '''diffraction''' of a [[wave]] through a [[Single Slit Diffraction|single slit]]. To explore this yourself using physics simulations, visit the website 'phet' by clicking on the image.| style="height:20px; width:200px; text-align:center;" |This image shows a plan view of '''diffraction''' of a [[wave]] through a [[Double Slit Diffraction|double slit]].To explore this yourself using physics simulations, visit the website 'phet' by clicking on the image.
|}