An electromagnetic wave is travelling in vacuum along the horizontal or x-axis. It consists of an electric field of peak strength 2.1 x 10-5 Vm-1 in the vertical direction or z axis and a magnetic field.
a) Find what is the speed v?
b) Obtain the peak strength of the magnetic field component?
c) If the E were momentarily vertical (+z) and the velocity is in the +x direction, find what direction is B at that instant?
d) Find what are the direction of E, B and v one half periods later?
e) Find the magnitude of the associated pointing vector?