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Why can two red pigments that look similar produce different mixing results?

Answer and explanation

Correct answer: Their spectral reflectance and colour bias may differ.

The governing concept is pigment selectivity: each pigment absorbs and reflects a particular combination of wavelengths. Two reds may look alike alone but have different spectral behaviour or a different bias toward orange or violet. When mixed, those hidden differences affect the wavelengths removed and the final colour, so option A is correct; the other choices deny pigment chemistry or overstate the brush’s role.

Related tags

Pigment PropertiesSpectral ReflectanceColour BiasColour MixingColour TheoryArt EducationClass 9 Mcq

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