Spectral Fingerprints
Identify which elements left their line fingerprints in a spectrum — then spot which way the whole pattern shifted.
How to play
Pick the mix of elements whose absorption lines match the spectrum, then say whether the shifted pattern is redshifted (receding) or blueshifted (approaching). Hint: Doppler shift moves all lines together, so the pattern never changes. Score high across the rounds to win.
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