Discussion
Assertion (A): A metameric match is inherently fragile.
Reason (R): It depends on a coincidence of integration rather than on identical spectra.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. A metameric match works because two different reflectance curves, weighted by the illuminant and the observer functions and integrated, happen to give the same three numbers. Change either weighting and the coincidence is gone, because nothing about the underlying spectra was ever the same.
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