In: Physics
a. Write an expression for the electric field vector of a
uniform plane wave in free space that is propagating in the
direction given by a line from the origin to the point (3,0,4) and
that is linearly polarized along the y-direction. It has a
wavelength of 2 �m and reaches its positive maximum amplitude of 20
V/m at a distance of 1 m from the origin at t = 0 s.
b. Compute the irradiance of this wave.