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optics

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Optics is a branch of physics that is the study of light and vision.

(noun)

An example of optics is the technology of an astronomical telescope.

See optics in Webster's New World College Dictionary

noun

the branch of physics dealing with the nature and properties of light and vision

Origin: < optic

See optics in American Heritage Dictionary 4

noun (used with a sing. verb)

The branch of physics that deals with light and vision, chiefly the generation, propagation, and detection of electromagnetic radiation having wavelengths greater than x-rays and shorter than microwaves.

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