Discussion
Assertion (A): Kubelka Munk theory is central to computer colour matching.
Reason (R): The K over S function is approximately linear in colourant concentration.
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. \( K/S = (1-R)^2/2R \) is very nearly proportional to concentration and additive across colourants, so a target curve can be decomposed into contributions and solved for the concentrations. Without that near-linearity, recipe prediction would be an intractable search rather than a calculation.
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