A) Elements present, temperature
B) magnetic field, density, mass
C) distance of the star
D) Both (a) and (b)
Correct Answer: D
Solution :
Option (d) is correct. Explanation: From spectrum lines analysis, astrophysists can determine not only the element, but the temperature and density of that element in the star. The spectral line also can tell us about any magnetic field of the star.
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