Sirius has a brightness through a blue filter of bB = 9.4 × 10-8 W/m2. What does this tell you about Sirius?
A) Sirius is a particularly bright star.
B) Sirius is a particularly hot star.
C) Sirius is a particularly cool star.
D) This number, by itself, tells you nothing about Sirius.
Correct Answer:
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