The Spectra of Most Stars Are Dark-Line Spectra Because ________

Multiple Choice

The spectra of most stars are dark-line spectra because ________.

A) elements in the Sun's outer atmosphere emit radiation between these dark bands
B) elements in the Sun's outer atmosphere absorb in these dark-line bands,blocking the radiation in those bands
C) elements in the earth's atmosphere absorb in these dark-line bands,blocking out the frequencies in the dark bands
D) electrons decaying to a lower energy state emit a photon at a fixed energy,leaving dark bands between the emissions