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doit_the_clown doit_the_clown
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7 years ago
A visible light spectrum of the Sun reveals many dark absorption lines.  These lines are caused by photon absorption which takes place in the
   A)  corona.    B)  photosphere.    C)  sunspot groups.    D)  solar interior.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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discovererdiscoverer
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doit_the_clown Author
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7 years ago
This site is awesome
mambah4
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Smart ... Thanks!
ouasfoudgewu
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2 hours ago
this is exactly what I needed
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