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| style="height:20px; width:200px; text-align:center;" |A '''convex lens''' [[focus|focuses]] [[parallel]] [[Light Ray|rays]] to a [[Focal Point|focal point]].
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==Key Stage 4==
===Meaning===
A '''convex''' [[lens]] is a shaped piece of [[glass]] that is thickest at the centre and thinnest at the edges.
{| class="wikitable"
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|[[File:ConvexLens.png|center|100px]]
|[[File:ConvexLensSymbol.png|center|100px]]
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| style="height:20px; width:200px; text-align:center;" |A picture of a '''convex lens'''.
| style="height:20px; width:200px; text-align:center;" |They symbol used in [[diagram]]s to represent a '''convex lens'''
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===About Convex Lenses===
: A '''convex lens''' causes [[parallel]] [[Light Ray|rays]] of [[light]] to [[converge]], so it can also be called a [[Converging Lens|converging lens]].
: A '''convex''' [[lens]] is used to [[focus]] [[light]].
===Finding the Focal Length===
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|[[File:ConvexLensFocalPoint.png|center|500px]]
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| style="height:20px; width:200px; text-align:center;" |A '''convex lens''' [[focus|focuses]] [[parallel]] [[Light Ray|rays]] to a [[Focal Point|focal point]].
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: The [[Focal Length|focal length]] of a '''convex lens''' is the distance between the [[Focal Point|focal point]] and the centre of the [[lens]].