spectrograph

This 3d printed spectrograph is crudely based upon the spectrograph in the article Grove, et. al., American Journal of Physics, 86, p. 594 (2018). For those not familiar with the terminology, a spectrograph takes pictures of images that are representative of light intensity versus wavelength, and this spectrograph is a low-budget way of incorporating spectra and spectroscopy into secondary or undergraduate education. I have included pictures of spectra taken by this spectrograph in the photos (fluorescent lights and Helium). The fluorescent light spectra was used to calibrate the device and the accuracy of measuring unknown wavelengths is ~ 2nm. There are many activities you can do with these spectrographs (for example see, https://www.aapt.org/Programs/contests/upload/AppCompSM15_booklet_done2.pdf pp. 72 – 81), but I prefer to let my students explore and invent their own light investigations whenever practical.
The complete design uses a webcam with suggested low budget webcams l