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Star a Is Four Times as Luminous as Star B

Question 65

Multiple Choice

Star A is four times as luminous as star B.Star B's spectrum peaks at 300 nm,while star A's spectrum peaks at 150 nm.How large is the radius of star A compared to star B?


A) 1/2 as large
B) 1/4 as large
C) twice as large
D) four times as large

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