Exam-style question
Try this first
What information can be derived from the spectral lines of a star?.
- A.The star's distance from Earth
- B.The star's chemical composition and temperature
- C.The star's age
- D.The star's luminosity
Model answer
What a good answer should say
- The star's chemical composition and temperature
Explanation
Why this works
The cause is the interaction of light with the elements in the star's atmosphere. The mechanism involves specific wavelengths being absorbed or emitted by these elements, creating distinct spectral lines.
The effect is that these lines provide evidence of the star's chemical composition and temperature. This information is essential for understanding the star's lifecycle and evolution.
Common mistake
No common mistake is linked to this question yet.