[2019EM/QUIZ-10]

Electrodynamics                                                Apr 8, 2019
                                        Quiz-X

• At the upper surface of the Earth’s atmosphere, the time-averaged magnitude of the Poynting vector \(<S> =1.35^10^{W/m}^2\) is referred to as

  the solar constant.

  1. Assuming that the Sun’s electromagnetic radiation is a plane sinusoidal wave, what are the magnitudes of the electric and magnetic fields?
  2. What is the total time-averaged power radiated by the Sun? The mean Sun-Earth distance is \(R =1.50\times10^{11}\) m .

• Following equation contains the complete information about the electromagnetic wave \begin{equation*} \vec{E}(z,t)=E_0\sin(kz-\omega t)\hat{i} \end{equation*} Find the directions of wave propagation, wavelength, frequency, speed of propagation, magnetic field, the Potynting vector and the intensity of the wave.