An optical instrument used to observe and analyze colors or color phenomena, or to examine objects using colored light.
From Greek 'chroma' (color) and 'skopein' (to view or examine). The word combines these roots to describe a tool for observing colors, following the pattern of other scientific instruments like telescope and microscope.
Victorian scientists loved creating instruments with -scope in the name—and chromoscopes were actually used to study light absorption and analyze mineral compositions by their color properties, making them early tools in spectroscopy.
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