Àdàkọ:POTD/2007-07-20
| Àwòrán Ọjọ́ Òní | |
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A picture of cutlery made of biodegradable plastic. The image was created using photoelasticity, an experimental method to determine stress distribution in a material. The method is based on the property of birefringence, which is when a ray of light passing through a transparent material experiences two refractive indices. Photo credit: Scott Bauer, ARS |