Question

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

Answer 1

= 3.869 × 10^-6 J/m³

Step-by-step 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