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geometrical optics

noun
1.
the branch of optics dealing with light as rays, especially in the study of the effects of lenses and mirrors on light beams and of their combination in optical instruments.
Origin of geometrical optics
1830-1840
1830-40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for geometrical optics
  • In the case of vegetation, geometrical optics is used since the leaf size is typically larger than the wavelength.
  • The camera presents an excellent way to illustrate principles of geometrical optics.

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