The Radius of a Star Is 6

question 47

Multiple Choice

The radius of a star is 6.95 × 10⁸ m,and its rate of radiation has been measured to be 5.32 × 10²⁶ W.Assuming that it is a perfect emitter,what is the temperature of the surface of this star? (σ = 5.67 × 10^-8 W/m² ∙ K⁴)

• A)6.27 × 10³ K
• B)8.25 × 10³ K
• C)8.87 × 10³ K
• D)3.93 × 10⁷ K
• E)5.78 × 10⁷ K

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Definitions:

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