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This exhibit
takes a beam of white light, passes it through a prism to separate
the colors, and projects the resultant colors on a screen. The visitor
can place transparent colored filters in the white light beam and
watch the spectrum to find out which colors are absorbed by the
filter. A small portion of the white light bypasses the prism and
is projected on a separate screen to allow the visitor to see the
effects of the filter on white light in addition to its effects
on the spectrum.
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