Question

of the amplitude of the magnetic field in a plane wave with wave number kis B, and is the speed of light, then the amplitude of the pointing vector (I/m?) ОА В?слио O B.208 OC. (coo)!/22 D. None of the above

Answer 1

The amplitude of electric field is,

$E=cB$

Poynting vector is defined as:

$\vec S=\frac{\vec E\times\vec B}{\mu_0}$

Then, the amplitude term corresponding to the above form is,

ЕВ So : По cB x В ро св2 Но

That is, option A is the right answer.