Electromagnetic WavesHard
Question
The rms value of the electric field of the light coming from the Sun is 720 N/C. The average total energy density of the electromagnetic wave is
Options
A.3.3 × 10-3 j/m3
B.4.58 × 10-6 j/m3
C.6.37 × 10-9 j/m3
D.81.35 × 10-12 j/m3
Solution
Uav =1/2 ε0E2rms = 4.58 × 10-6 j/m3
Uav = 4.58 × 10-6 J/m3
Uav = 4.58 × 10-6 J/m3
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