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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
The energy emitted by a star increases as the fourth power of its surface temperature and a red giant star has a lower temperature than the Sun. Why then is the luminosity of a red giant about a thousand times larger than that of the Sun?
A)   Because it is bigger and therefore has a much larger surface area
B)   Because the energy transfer from red giant's interior is much more efficient than it is in the Sun
C)   Because more of its total output of energy is in the visible range than that of the Sun and hence the red giant appears brighter
D)   Because the red giant's nuclear furnace is producing much more energy than that of the Sun
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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hyponoticahyponotica
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staedtler Author
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7 years ago
I really appreciate your help!
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