The Bright Star Named Rigel Has a Luminosity of 66,000

question 1

Multiple Choice

The bright star named Rigel has a luminosity of 66,000 L and a temperature of 11,000 K.What is its radius? Note that the temperature of the Sun is 5,800 K.

• A)5 R_☉
• B)30 R_☉
• C)70 R_☉
• D)135 R_☉
• E)190 R_☉

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