What is the average value of the magnitude of the Poynting vector $\vec { S }$ at 1 meter from a 100-watt lightbulb radiating in all directions? A)1 W/m² B)4 W/m² C)2 W/m² D)8 W/m² E)12 W/m²

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The Answer of What is the average value of the magnitude of the Poynting vector $\vec { S }$ at 1 meter from a 100-watt lightbulb radiating in all directions? A)1 W/m² B)4 W/m² C)2 W/m² D)8 W/m² E)12 W/m²

What Is the Average Value of the Magnitude of the Poynting