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Exposition

  • Page ID
    60636
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    The wide availability of cellular telephones equipped with CMOS cameras (and of digital cameras directly exporting JPG files) opens many opportunities for inexpensive, portable photometric measurements. Spectrophotometry makes more sense to students when they can see light change intensity when passed through a sample than when they can only see equations, sketches, or the output of a computer screen or meter. Better yet, they can learn the concepts of dynamic range, stray light, saturation, digitization error, order overlap, and dispersion more easily by seeing the phenomena than by only hearing of them. In this paper, we report the construction and give the hardware, software, and laboratory instructions for a diffraction spectrograph/cell phone (or digital camera) array detector suitable for high school and college students.


    This page titled Exposition is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Contributor.

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