Fresnel mirrors

noun

Definition of Fresnel mirrors

: two plane mirrors hinged so that there is no gap between the edges and so that the two planes make an angle with each other of nearly 180 degrees and used in demonstrating interference phenomena

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“Fresnel mirrors.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Fresnel%20mirrors. Accessed 26 Nov. 2020.

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