Consider a 150-W incandescent lightbulb that radiates light in all directions. At a distance of 1.5 m the time-averaged energy flux emitted by the bulb is
A) 7.9 W/m2.
B) 5.3 W/m2.
C) 100 W/m2.
D) 67 W/m2.
Correct Answer:
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