The electric field of a plane electromagnetic wave is given by
\(\overrightarrow { y }=E_0 \hat{i} \cos(kz)\cos(\omega t) \)
The corresponding magnetic field \(\overrightarrow { B }\) is then given by:
1
\(\overrightarrow { B }=\dfrac{E_0}{c} \hat{i}\sin(kz)\cos(\omega t)\)
2
\(\overrightarrow { B }=\dfrac{E_0}{c} \hat{j}\sin(kz)\cos(\omega t)\)
3
\(\overrightarrow { B }=\dfrac{E_0}{c} \hat{k}\sin(kz)\cos(\omega t)\)
4
\(\overrightarrow { B }=\dfrac{E_0}{c} \hat{j}\cos(kz)\sin(\omega t)\)