DescriptionPhotoelasticity and color on a stressed glass plate with two marbles.jpg
English: A plate of glass is pressed between 2 marbles with a clamp and it is placed between two crossed polarizers appears intense and beautiful colors. According to the theory of photoelasticity, the allocation of the colors gives information about the existence and the allocation of stresses in the material of the ruler. These stresses are a result of the forces applied by the marbles.
English: Photoelasticity and colors on a stressed glass plate
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