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    Hi, I need help with this diffraction grating question.
    How do I tell which elements that are present in the atmosphere of star X?
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    Mercury
    Helium
    Hydrogen

    All their lines they have must line up exactly with Star X's and they shouldn't have lines which don't appear in Star X's line spectrum.
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    (Original post by RKM21)
    Mercury
    Helium
    Hydrogen

    All their lines they have must line up exactly with Star X's and they shouldn't have lines which don't appear in Star X's line spectrum.
    Ah right I see, thanks
 
 
 
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