The answer is (e): be like the white light spectrum above with some other color missing, as seen in the photograph below that contains both the color patch and its spectrum.
A negative filter achieves its color by removing the complementary color of light from the spectrum. Because yellow and blue are complementary colors, a negative yellow filter removes blue light from its spectrum.
If the two color patches below are produced by placing negative filters in front of white light, what will their spectra look like?
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