An electromagnetic wave with frequency $$\omega$$ and wavelength $$\lambda$$ travels in the $$+y$$ direction. Its magnetic field is along $$+x$$-axis. The vector equation for the associated electric field (of amplitude $$E_0$$) is

A

$$\vec{E} = -E_0\cos\left(\omega t + \frac{2\pi}{\lambda}y\right)\hat{x}$$

B

$$\vec{E} = E_0\cos\left(\omega t - \frac{2\pi}{\lambda}y\right)\hat{x}$$

C

$$\vec{E} = E_0\cos\left(\omega t - \frac{2\pi}{\lambda}y\right)\hat{z}$$

D

$$\vec{E} = -E_0\cos\left(\omega t + \frac{2\pi}{\lambda}y\right)\hat{z}$$