Would you expect to see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K?
A) No; these stars are so hot that most of the hydrogen is ionized and the atoms cannot absorb energy.
B) Yes; these stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state.
C) Stars of this temperature are too cool to produce an absorption spectrum.
D) Stars of this temperature are too hot to produce an absorption spectrum.
Correct Answer:
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