The electric field in a plane electromagnetic wave is given by:
$E_y = 69 \sin \left[ 0.6 \times 10^3 x - 1.8 \times 10^{11} t \right] \text{V/m}.$
The expression for magnetic field associated with this electromagnetic wave is ________.
\( B_{z} = 2.3 \times 10^{-7} \sin \left[ 0.6 \times 10^{3} x + 1.8 \times 10^{11} t \right] \)
\( B_{z} = 2.3 \times 10^{-7} \sin \left[ 0.6 \times 10^{3} x - 1.8 \times 10^{11} t \right] \)
\( B_{y} = 2.3 \times 10^{-7} \sin \left[ 0.6 \times 10^{3} x - 1.8 \times 10^{11} t \right] \)
\( B_{y} = 69 \sin \left[ 0.6 \times 10^{3} x + 1.8 \times 10^{11} t \right] \)
