The Dark Absorption Lines in the Solar Spectrum Are Caused

question 72

Multiple Choice

The dark absorption lines in the solar spectrum are caused by

• A) a cooler layer of gas overlying the hot solar surface, which contains many elements, including hydrogen, helium, magnesium, calcium, and iron.
• B) a cooler layer overlying the hot solar surface, consisting solely of hydrogen gas, which produces all the absorption lines.
• C) absorption by atoms and molecules in Earth's cool atmosphere.
• D) a hotter layer of gas that overlies the cooler solar surface and produces the absorption lines.

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