Question

What is Results from Maxwell’s Equations?

Answer

Results from Maxwell's Equations - (i) Relation between amplitude of electric (E₀) and the magnetic field (B₀) is given by E₀ = cB₀ where, speed of EM waves c = 1/√μ₀ ε₀ = 3 × 10⁸ m/s (ii) The average of energy density associated with electromagnetic wave is found to be U_av = 1/2 ε₀ E²₀ = Electric field energy density U_av = 1/2μ₀ B²₀ = 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_av = 1/2 ε₀cE²₀ = P_s/4πr² where, P_s is power of the source and r is distance from the source.