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physical optics

noun plural but usually singular in construction
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Definition of physical optics

: a branch of optics that deals with the description and explanation of all optical phenomena in terms of physical theories (as undulatory theory, electromagnetic phenomena, or quantum mechanics)

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“Physical optics.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/physical%20optics. Accessed 22 Oct. 2021.

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