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16 December, 11:04

The intensity of sunlight under the clear sky is 1160 w/m2. how much electromagnetic energy is contained per cubic meter near the earth's surface? the speed of light is 2.99792 * 108 m/s. answer in units of j/m3

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  1. 16 December, 11:50
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    = 3.869 * 10^-6 J/m³

    Explanation:

    Intensity is given as W/m^2 which is equivalent to J / (s*m^2)

    Speed of light is 2.99792 * 10^8 m/s.

    Therefore;

    Electromagnetic energy per cubic meter = Intensity/speed of light

    = 1160 J / (s*m³) / 2.99792 * 10^8 m/s.

    = 3.869 * 10^-6 J/m³
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