Exam-style question
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Why is interpreting stellar spectra important in astrophysics?.
- A.It helps determine the distance of stars.
- B.It identifies elements present in stars.
- C.It measures the star's brightness.
- D.It predicts the star's lifespan.
Model answer
What a good answer should say
- It identifies elements present in stars.
Explanation
Why this works
The evidence indicates that stellar spectra reveal absorption lines corresponding to specific elements. This implies that by analyzing these lines, astronomers can determine the chemical composition of stars.
Therefore, we conclude that interpreting stellar spectra is essential for understanding the physical and chemical properties of stars.
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