"plano-concave." YourDictionary, n.d. Web. 18 December 2018. <https://www.yourdictionary.com/plano-concave>.
plano-concave. (n.d.). Retrieved December 18th, 2018, from https://www.yourdictionary.com/plano-concave
Light rays disperse through a plano-concave lens.
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