A sinusoidal EM wave has an electric field amplitude Em = 39.0 mV/m. What are the intensity and average energy density? [Hint: Recall the relationship between amplitude and rms value for a quantity that varies sinusoidally.]
average energy density?
intensity?
2007-03-25 13:36:07 · 1 answers · asked by David S 2 in Science & Mathematics ➔ Physics
Energy density of an electric field is (e0/2)*E^2. (e0 is permitivity.) The rms value of a sinusoidal field is Ep/√2, so average E^2 is Ep^2/2. The average energy density is then e0/4 * Ep^2. The peak intensity is Em, the average intensity is Em/√2.
2007-03-25 14:01:27 · answer #1 · answered by gp4rts 7 · 0⤊ 0⤋
Average Energy Density
2016-10-19 08:17:30 · answer #2 · answered by ? 4 · 0⤊ 0⤋
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Average energy density and intensity?
A sinusoidal EM wave has an electric field amplitude Em = 39.0 mV/m. What are the intensity and average energy density? [Hint: Recall the relationship between amplitude and rms value for a quantity that varies sinusoidally.]
average energy density?
intensity?
2015-08-18 08:02:16 · answer #3 · answered by ? 1 · 0⤊ 0⤋