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The white point for D65 and the 1931 observer has approximate chromaticity coordinates

  • A.x of 0.5 and y of 0.5
  • B.x of 0.3333 and y of 0.3333
  • C.x of 0.4476 and y of 0.4074
  • D.x of 0.3127 and y of 0.3290

Answer: D

The equal energy point at one third each corresponds to illuminant E instead. Illuminant A sits near 0.4476 and 0.4074 on the same diagram. Equal energy sits at one third each instead. Illuminant A lies further towards the red.

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