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doit_the_clown doit_the_clown
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7 years ago
The strength of the magnetic field in a sunspot is estimated from the Earth by
A)   measuring the size and brightness of the sunspot.
B)   measuring the size and mass of a prominence suspended above the sunspot.
C)   measuring the shape of structures seen in the corona above sunspots during solar eclipses.
D)   observing the wavelength splitting of atomic spectral lines by the Zeeman effect.
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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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hyponoticahyponotica
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doit_the_clown Author
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7 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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You make an excellent tutor!
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