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Photoelasticity
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{{short description|Change in optical properties of a material due to stress}} [[File:BiodegradablePlasticUtensils2.jpg|thumb|Plastic utensils in a photoelasticity experiment]] {{Refimprove|date=September 2022}} In [[materials science]], '''photoelasticity''' describes changes in the [[optical properties]] of a material under mechanical [[Deformation (engineering)|deformation]]. It is a property of all [[dielectric|dielectric media]] and is often used to experimentally determine the [[Stress (mechanics)|stress]] distribution in a material.
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