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Discussion

The relationship between metamerism and the number of colourants used is that

  • A.three colourants always suffice for a spectral match
  • B.more colourants generally allow a closer spectral match
  • C.fewer colourants always give a closer spectral match
  • D.the number of colourants has no bearing at all on metamerism

Answer: B

More degrees of freedom allow the curve shape to be fitted more closely. Cost and complexity rise correspondingly with each colourant added. Degrees of freedom improve the achievable fit. Cost rises with each colourant added.

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