If a Certain Star Shows a Strong Absorption Spectrum in Hydrogen

question 76

Multiple Choice

If a certain star shows a strong absorption spectrum in hydrogen Balmer lines, the surface temperature of the star is hot enough that

• A) virtually all of the hydrogen atoms are ionized.
• B) many hydrogen atoms have electrons in the n = 2 energy level.
• C) many hydrogen atoms have electrons in the n = 3 energy level.
• D) many helium atoms have been converted to hydrogen atoms.

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Definitions:

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