| style="height:20px; width:200px; text-align:center;" |When [[light]] enters a new [[medium]] it changes direction.
| style="height:20px; width:200px; text-align:center;" |[[Light]] is [[Refraction|refracted]] as it passes from one [[medium]] into another.
|}
====Refraction At a Curved Interface====
{| class="wikitable"
|-
|[[File:ConvexRayDiagram1.png|center|600px]]
|-
| style="height:20px; width:200px; text-align:left;" |A [[Ray Diagram|ray diagram]] for a '''convex [[lens]]'''.
In this [[diagram]]:
"Ray 1" is shown crossing the [[Focal Point|focal point]] of the [[lens]] after being [[refract]]ed.
"Ray 2" is shown passing through the centre of the [[lens]].
"Ray 3" is shown crossing the [[Focal Point|focal point]] before the [[lens]].
The [[diagram]] shows that a [[diminish]]ed [[Real Image|real image]] is produced when the [[Object Distance|object distance]] is greater than the [[Focal Length|focal length]] of the '''convex [[lens]]'''.
|}
{| class="wikitable"
|-
|[[File:ConvexRayDiagram1.png|center|300px]]
|[[File:ConvexRayDiagram2.png|center|300px]]
|-
| style="height:20px; width:200px; text-align:center;" colspan = "2" |Comparing these two [[diagram]]s shows that the [[image]] size increases as the [[Object Distance|object distance]] approaches the [[Focal Length|focal length]] of the [[lens]].
|}