Multiple Choice
Which of these atoms or ions produces strong absorption lines in the spectra of stars with relatively cool surface temperatures?
A) TiO, molecules of titanium oxide
B) Mg II, ionized magnesium
C) Ca II, ionized calcium
D) He I, neutral helium
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q25: Which of these spectral luminosity classes corresponds
Q26: Aristotle (fourth century B.C.) rejected the idea
Q27: The European Space Agency recently launched the
Q28: Which of these atoms or ions produces
Q29: A star of apparent magnitude -1.5 appears
Q31: The Hertzsprung-Russell diagram is a plot of<br>A)
Q32: The Sun's classification in terms of its
Q33: Which of these could plausibly be the
Q34: The modern system of apparent magnitudes uses
Q35: How far away is the nearest star