Objective: To describe the measureable characteristics of electromagnetic waves, and to use these characteristics to calculate various useful quantities of these waves. 1. a. The magnetic field of a certain electromagnetic field is given by: Bx = 0 By = (4.8 x 10-7) cos(k z - ( t) Tesla Bz = 0 In the diagram below draw the electric field and the magnetic field vectors at the origin and t = 0, and indicate the direction of wave travel. In addition, write down the mathematical expressions for the components of the electric field of this wave, including the components whose value is zero. Be careful about directions! +Z +y +X b. Calculate the components of the Poynting vector Š for this EM wave and its intensity I. Hint: according to the text, I = Saverage. Make sure the units of the Poynting vector components make sense!

Objective: To describe the measureable characteristics of electromagnetic waves, and to use these characteristics to calculate various useful quantities of these waves. 1. a. The magnetic field of a certain electromagnetic field is given by: Bx = 0 By = (4.8 x 10-7) cos(k z - ( t) Tesla Bz = 0 In the diagram below draw the electric field and the magnetic field vectors at the origin and t = 0, and indicate the direction of wave travel. In addition, write down the mathematical expressions for the components of the electric field of this wave, including the components whose value is zero. Be careful about directions! +Z +y +X b. Calculate the components of the Poynting vector Š for this EM wave and its intensity I. Hint: according to the text, I = Saverage. Make sure the units of the Poynting vector components make sense!