Why Are the Balmer Lines of Hydrogen Weak in Stars

question 26

Multiple Choice

Why are the Balmer lines of hydrogen weak in stars that are hotter than about 10,000 K?

• A)Hydrogen is mostly ionized in hot stars
• B)Hot stars are made mostly of helium
• C)Most hydrogen atoms are in the ground state in hot stars
• D)Most hydrogen is in molecular form in hot stars

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