DescriptionDichroic filter from a DLP projector color wheel.jpg
English: Color wheel from a DLP projector. Wheel has 6 segments
and passes RGBRGB light. It uses dichroic filters which reflect the unwanted light (rather than absorbing it as stained glass would), hence the q-tip is illuminated by reflected Cyan/Magenta/Yellow, as this is what remains from white light when the Red/Green/Blue is removed.
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