# Physics

A plane monochromatic electromagnetic wave with wavelength = 2.2 cm, propagates through a vacuum. Its magnetic field is described by B=(B_xi^+B_yj^)cos(kz+t)where Bx = 3.1 X 10-6 T, By = 3.4 X 10-6 T, and i-hat and j-hat are the unit vectors in the +x and +y directions, respectively. .1) What is f, the frequency of this wave?2) What is I, the intensity of this wave?3) What is Sz, the z-component of the Poynting vector at (x = 0, y = 0, z = 0) at t = 0?4) What is Ex, the x-component of the electric field at (x = 0, y = 0, z = 0) at t = 0?