# 8. Suppose that the electric field amplitude of an electromagnetic wave is and that its frequency is  (a) Determine, (b) Find expressions for E and B.

E0 = 120 NC-1

(a)

=

Angular frequency ()  = 2

Propagation constant(k)

=

=

=

Wavelength() =

=

Assuming the electromagnetic wave propagates in the positive z-direction the Electric field vector will be in the positive x-direction and the magnetic field vector will be in the positive y-direction as they are mutually perpendicular and   gives the direction of propagation of the wave.

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