Visible light is an electromagnetic wave, in which the electric and magnetic fields propagate as transverse waves. For a harmonic wave polarized in the x direction and propagating in the z direction in empty space, the fields have the form Ex (Z, t) = E. cos (kz - wt), By (z, t) = Bo cos (kz - wt) . The wavelength I is given below. DATA: 1 = 500 nm; Eo = 140 V/m. Determine the parameter k. (in m^-1) OA: 4.122x 106 OB: 5.977x106 OC: 8.666x106 OD: 1.257x107 OE: 1.822x107 OF: 2.642x107 OG: 3.831x107 OH: 5.555x107 Submit Answer Answer Submitted: Your final submission will be graded when the time limit is reached. Tries 1/12 Previous Tries Determine the average field energy density u in the wave. (in J*m^-3) OA: 3.687x 10-8 OB: 4.903x 10-8 OC: 6.521x10-8 OD: 8.673x10-8 OE: 1.154x10-7 OF: 1.534x10-7 OG: 2.040x10-7 OH: 2.714x10-7 Submit Answer Answer Submitted: Your final submission will be graded when the time limit is reached. Tries 1/12 Previous Tries