At what distance from a 27 mW point source of electromagnetic waves is the electric field...
Question:
At what distance from a {eq}27 \ mW {/eq} point source of electromagnetic waves is the electric field amplitude {eq}0.010 \ V / m {/eq}?
Energy Density of Electromagnetic waves
The energy density of Electromagnetic wave is defined as the energy stored by the electric field component and magnetic field component of Electromagnetic wave.
Mathematically, {eq}U_{total}=\ U_{E}+\ U_{B}\\ U_{total}=\ \dfrac{\epsilon_{0} E_{0}^{2}}{2}+\ \dfrac{B_{0}^{2}}{2\mu_{0}} {/eq}
Answer and Explanation: 1
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Magnetic Permeability of free space, {eq}\mu_{0}=\ 4 \pi \times 10^{-7}\ TmA^{-1} {/eq}
Speed of light, {eq}c=\ 3\times 10^{8}\...
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