Discussion
Assertion (A): Automotive finishes are prone to geometric metamerism.
Reason (R): Metallic and pearlescent flakes make the appearance strongly angle dependent.
Answer: C
Both are true and the reason gives the cause of the angle dependence, and one reading cannot describe such a finish. Several measurement angles are written into the specification for these coatings. A single angle cannot describe the finish. Automotive coatings are the usual example.
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