# 11) Suppose that the electric field part of an electromagnetic wave in vacuum is $E = \left \{ ( 3.1 N/C )\cos [ ( 1.8 rad /m)y + ( 5.4 \times 10 ^6 rad /s t )] \right \} \hat i$ (d) What is the amplitude of the magnetic field part of the wave?

Answers (1)

From the given equation of the electric field, we can infer Electric field amplitude (E0) =3.1 NC-1

$Magnetic field amplitude (B_0) =\frac{E_{0}}{c}$

$=\frac{3.1}{3\times 10^{8}}$

=1.03$\times$10-7 T

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