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    Physics & Astronomy
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    Astronomy The Solar System
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    Exam 13: Taking the Measure of Stars
  5. Question
    The Bright Star Arcturus Has a Luminosity of 210 L<sub>SUN</sub>
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The Bright Star Arcturus Has a Luminosity of 210 LSUN

Question 49

Question 49

Essay

The bright star Arcturus has a luminosity of 210 LSUN and a temperature of 4300 K.What is its radius? Note that the Sun has a temperature of 5800 K.

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Using the Stefan-Boltzmann law...

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