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By their very nature colour filters absorb light of the wavelengths they do not pass. So (simplistically) green absorbs blue & red, red absorbs blue & green etc. This means approx 50-70% of the...
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By their very nature colour filters absorb light of the wavelengths they do not pass. So (simplistically) green absorbs blue & red, red absorbs blue & green etc. This means approx 50-70% of the...
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West Yorkshire, United Kingdom
