(1) How and why does the strength of the hydrogen absorption lines vary between stars of different spectral types? How does the spectrum of the Sun compare to the spectrum of an A star (in terms of the strength of the hydrogen lines)? How does the spectrum of an A star compare to the spectrum of an O star? Explain your reasoning.
(1) How and why does the strength of the hydrogen absorption lines vary between stars of different spectral types? How does the spectrum of the Sun compare to the spectrum of an A star (in terms of the strength of the hydrogen lines)? How does the spectrum of an A star compare to the spectrum of an O star? Explain your reasoning.
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Transcribed Image Text:(1) How and why does the strength of the hydrogen absorption lines vary between stars of
different spectral types? How does the spectrum of the Sun compare to the spectrum of an A
star (in terms of the strength of the hydrogen lines)? How does the spectrum of an A star
compare to the spectrum of an O star? Explain your reasoning.
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