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fermat's principle

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Fermat's principle

 
Use fermat's principle in a Sentence
–noun
Optics. the law that the path taken by a ray of light in going from one point to another point will be the path that requires the least time.
Origin:
1885–90; named after P. de Fermat
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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