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Results from Maxwell s Equations #8211; (i) Relation between amplitude of electric (E<sub>0</sub>) and the magnetic field (B<sub>0</sub>) is given by E<sub>0</sub> = cB<sub>0</sub> where, speed of EM waves c = 1/√μ<sub>0</sub> ε<sub>0</sub> = 3 times; 10<sup>8</sup> m/s (ii) The average of energy density associated with electromagnetic wave is found to be U<sub>av</sub> = 1/2 ε<sub>0</sub> E<sup>2</sup><sub>0</sub> = Electric field energy density U<sub>av</sub> = 1/2μ<sub>0</sub> B<sup>2</sup><sub>0</sub> = Magnetic field energy density (iii) Linear momentum (p) associated with electromagnetic wave is given by p = U/c where, U = Energy of the electromagnetic wave c = Speed of electromagnetic wave (iv) Intensity (I) of EM wave is energy crossing through unit area in unit time, I = U<sub>av</sub> = 1/2 ε<sub>0</sub>cE<sup>2</sup><sub>0</sub> = P<sub>s</sub>/4πr<sup>2</sup> where, P<sub>s</sub> is power of the source and r is distance from the source.
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