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The two laws of reflection are they applicable to both smooth surfaces and irregular surfaces or they are limited to just smooth surfaces.

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  • $\begingroup$ yes , they are. $\endgroup$ Commented Sep 16, 2022 at 16:46
  • $\begingroup$ This is how I think of it, an irregular surface is a collection of infinitely many regular surfaces, therefore, the alws hold $\endgroup$ Commented Sep 16, 2022 at 16:48
  • $\begingroup$ welcome to PSE. Please take this tour physics.stackexchange.com/tour, to get to know how to use this site $\endgroup$ Commented Sep 16, 2022 at 16:49

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If the irregularities are of the same order as the wavelength of the illumination then a substantial portion of the illumination will be scattered in many different directions rather than being reflected so the 'laws' will be only approximate. As irregularities tend to zero the 'laws' become more exact.

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