Discussion
Consider the following statements about the nature of colour.
1. Spectral reflectance is a physical property of a surface.
2. Colour is a perception requiring light, object and observer.
3. Colour resides entirely within the object being viewed.
Answer: B
Correct answer: 1 and 2 only
Statements 1 and 2 are correct and are the two halves of the standard account: reflectance is a physical property of the surface, and colour is the perception that arises when light, object and observer come together. Statement 3 places colour in the object alone, which cannot be right - the object’s reflectance does not change when the illuminant does, but the colour seen certainly does.
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