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Quartz Spectrograph

  • Circa 1924

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A spectrograph is an instrument used to obtain and record a light spectrum—it splits the light from an object into its component wavelengths so that it can be analysed. The spectral lines of a chemical element is produced and photographed by the spectrograph. When the photographic plate is developed, the spectral lines are precisely measured to determine the composition of the chemical element.

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  • Courtesy of Science History Institute

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Science History Institute. Quartz Spectrograph. Photograph, 2017. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/br86b4223.

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