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|[[File:Fabric.png|center|200px]]
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| style="height:20px; width:200px; text-align:center;" |[[Specular Reflection]] from the [[glass]] makes an [[image]] of the [[sky]] in the [[glass]].
| style="height:20px; width:200px; text-align:center;" |[[Diffuse Reflection]] from the [[fabric]] is how [[light]] gets from the [[fabric]] to our [[eyes]] to see it.
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: [[Reflection]] takes place at the [[interface]] between two [[medium|media]].
: For [[opaque]] [[material]]s [[reflection]] depends on the [[colour]] of the [[material]]. Rough [[opaque]] [[material]]s such as paper will [[Diffuse Reflection|diffusely reflect]] and smooth [[opaque]] [[material]]s will [[Specular Reflection|specularly reflect]] such as [[metal]]s.
: For [[transparent]] [[material]]s the chance of [[reflection]] at an [[interface]] depends upon the relative [[property|properties]] of those two [[medium|media]] and the [[Angle of Incidence]]. [[Wave]]s that arrive at an [[interface]] where there is a large difference in [[density]] or [[Refractive Index|refractive index]] are more likely to be '''reflected'''.
: [[Electromagnetic Wave|Electromagnetic waves]] travelling through a more [[Optical Density|optically dense]] [[medium]] will engage in [[Total Internal Reflection|total internal reflection]] at the [[interface]] with a less [[Optical Density|optically dense]] [[medium]].