Discussion
Assertion (A): Two sources of the same correlated colour temperature can look different.
Reason (R): They may sit on opposite sides of the Planckian locus at the same distance.
Answer: D
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. Correlated colour temperature reports only the nearest point on the locus, so two sources equally distant on opposite sides - one greenish, one pinkish - carry the same figure while looking visibly different. This is exactly why the distance from the locus must be quoted alongside it.
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