PURPOSE: Demonstrate three-color mixing with positive colors.
DESCRIPTION: Three identical slides taken in white light are projected superimposed on the same place by three slide projectors, but each is filtered by one of the three primary color filters: red, green, and blue. Add the three together to get the same effect as the original slide, which can be displayed with white light on a fourth slide projector for comparison.
REFERENCES: (PIRA unknown.)
EQUIPMENT: Four identical color slides, four slide projectors, red, green, and blue filters.
SETUP TIME: 5 min.
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