Problem

Suppose that the electric field of an electromagnetic wave in vacuum is

E = \{(3.0 \text{ N/C}) \cos[(1.8 \text{ rad/m}) y + (5.4 \times 10^6 \text{ rad/s}) t]\} \hat{i}

. (a) What is the direction of propagation of wave? (b) What is the wavelength

\lambda

? (c) What is the frequency

f

? (d) What is the amplitude of the magnetic field of the wave? (e) Write an expression for the magnetic field of the wave.