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I am also a high school teacher and have students doing investigations into spectroscopy. Is there any way to produce a spectrum of a star that may show spectral lines for a relatively cheap outlay. I have seen where you can print off a diffraction grating and put it onto an Overhead Transperancy that can be put over the front of a telescope. of course I can not find where my mate told me to look for this. Any suggestions.
Mark
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