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Geometric metamerism arises when two samples

  • A.match at one field size but not at another
  • B.match at one viewing angle but not at another
  • C.agree under one light source yet not under a second
  • D.agree for one person yet not for a second person

Answer: B

Differences in surface texture or in the presence of metallic flake are the usual cause. Multi-angle measurement is required for such materials. Texture and flake both cause the dependence. Several angles must therefore be measured.

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