Suppose that the electric field part of an electromagnetic wave in vacuum is `E = {(3.1 N//C) cos [(1.8 rad//m) y + (5.4 xx 10^(6) rad//s)t]} hat i`.
(a) What is the direction of propagation?
(b) What is the wavelength `lamda` ?
(c) What is the frequency ν ?
(d) What is the amplitude of the magnetic field part of the wave?
(e) Write an expression for the magnetic field part of the wave.

Explanation

(a) `-hat j`
(b) 3.5m,
(c ) 86 MHz,
(d) 100 nT,
`{(100 nT) cos [(1.8" rad/m")y+(5.4xx10^(6)" rad/s")t]} hat K`