Why Don't We See Hydrogen Balmer Lines in the Spectra

question 159

Multiple Choice

Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K

• A)There is no hydrogen in stars this hot.
• B)The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy.
• C)These stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state.
• D)Stars of this temperature are too cool to produce an absorption spectrum.
• E)Stars of this temperature are too hot to produce an absorption spectrum.

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