On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 2.16 X 103 W/m2. What is the electromagnetic energy contained in 1,694 m3 of space just above the earth’s surface? (c = 3.00 x 108 m/s)
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Given intensity = 2.16 x 10^3 W/m^2 and speed of light (c) = 3.00 x 10^8 m/s. Energy density = 2.16 x 10^3 / 3.00 x 10^8 = 7.2 x 10^-6 J/m^3. Show more…
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