Color filters held against a sheet of paper with two complementary colors. As can be seen each filter filters the opposite color to become quite dark.

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Size: 3696px × 2448px
Photo credit: © Kim Christensen / Alamy / Afripics
License: Royalty Free
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Keywords: blue, chromatology, color, colour, complementary, demonstration, education, educative, experiment, filter, laboratory, light, nature, optics, orange, physics, primary, school, science, scientific, secondary, subtractive, system, university, wavelenght