1 - Preliminary Questions For an electromagnetic wave traveling along the x-axis direction E (x,t) = E cos (kx- wt+ q) and B(x, t) = Bcos(kx- wt+ () Where E, and Bo indicate the maximum values of the amplitudes. 1. What is K? 2. What are the units of the k? 3. What is w? 4. What are the units of the w? 5. What is ? 6. What are the units of o? 7. If as said above the wave travels directed along the x- axis, what are the directions of oscillation of E and B? 8. How is the wave length related to the wave vector? 9. How is the angular frequency related to the frequency