6
QuizMultiple Choice

Beyond the Solar System — Test

Question 6 • Earth and Space Science

If a star's spectrum shows absorption lines at 656 nm, 486 nm, and 589 nm, which elements are most likely present in the star's atmosphere?

Answer
A
hydrogen and calcium
B
sodium and calcium
C
only hydrogen
D
hydrogen and sodium
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If a star's spectrum shows absorption lines at…