File:Photoelasticity and colors on a ruler.jpg

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Description	English: A ruler 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 may be a result of external forces or may be permanent stresses because of the procedure the ruler was manufactured (as it happens in the case of this picture). English: Photoelasticity and colors on a ruler
Date	26 June 2013
Source	Own work
Author	Takis lazos

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European Science Photo Competition 2015

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:20, 17 November 2015		600 × 400 (33 KB)	Takis lazos (talk \| contribs)	User created page with UploadWizard

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