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geometrical optics

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noun

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.

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“Evoke” and “invoke” both derive from the same Latin root “vocāre.”

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Origin of geometrical optics

First recorded in 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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