The discussion centers on the relationship between peak amplitudes of electric and magnetic fields in electromagnetic radiation and their intensity, defined as Power Flux Density (PFD) in W/m². The key equations presented are PFD = E²/R and PFD = R H², where R represents the intrinsic impedance of the medium, specifically 377 Ohms for free space. It is established that using peak amplitudes instead of RMS will result in halving the PFD. This relationship is crucial for understanding electromagnetic wave behavior.
PREREQUISITESPhysicists, electrical engineers, and students studying electromagnetic theory who seek to deepen their understanding of the relationship between field amplitudes and radiation intensity.
Intensity is Power Flux Density, expressed in W/m2. The RMS amplitudes of the electric and magnetic fields are related to PFD in the following way, where R is the intrinsic impedance of the medium, 377 Ohms for free space:-jeremyfiennes said:Electromagnetic radiation is propagating sinusoidal electric and magnetic fields. Are the peak amplitudes of these fields in any way related to the radiation's other parameters, e.g. its instensity?