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Home Q & A Board Science-Related Homework Help Physics
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symbo symbo
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7 years ago
In the spectrum of a particular star, helium absorption lines are stronger than hydrogen absorption lines, and there are very few spectral lines present from any other elements. What is the approximate temperature of this star?

(a)   Very high, about 30,000 K or hotter, hot enough to ionize most of the hydrogen atoms so they cannot absorb light in the Balmer series.
(b)   Quite low, about 6,000 K or less, cool enough that most of the hydrogen atoms are in the ground state so they cannot absorb light in the Balmer series.
(c)   Moderate temperature, about 10,000 K, so that most of the hydrogen atoms which are not in the ground state are ionized, leaving few to absorb in the Balmer series.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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symbo Author
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#2
6 years ago
This did it for me! Thank you
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