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The CIE 1976 lightness scale runs from

  • A.zero for a perfect black to one hundred for the white point
  • B.from minus one hundred to plus one hundred across the scale
  • C.zero to one
  • D.one to ten

Answer: A

Correct answer: zero for a perfect black to one hundred for the white point

The scale is anchored at both ends: zero for a perfect black and one hundred for the reference white. Values slightly above a hundred are possible for a sample brighter than the reference, such as one carrying a fluorescent whitening agent, but the nominal range is nought to a hundred.

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