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Doppler Shift Quiz

  1. While measuring the spectrum of your favorite star, you notice that the helium line appears shifted from it's normal wavelength of 587.6nm to a wavelength of 586.9. This means what?

  2. You closely measure the spectrum of a star over the course of several years and notice that it seems to Doppler shift periodically. Going from red shifted for 182.5 days to blue shifted for the next 182.5 days. What are you most likely measuring?

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