Multiple Choice
Of two stars of spectral class B5,one has broad hydrogen lines and the other has narrow hydrogen lines.How do these stars differ physically?
A) The star with the narrow lines is a main-sequence star,and the star with the broad lines is a giant or supergiant.
B) The star with the narrow lines is a hot star,and the star with the broad lines is a cool star.
C) The star with the narrow lines is a giant or supergiant,and the star with the broad lines is a main-sequence star.
D) The star with the narrow lines is a cool star,and the star with the broad lines is a hot star.
Correct Answer:
Verified
Correct Answer:
Verified
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