The electric field part of an electromagnetic wave in a medium is represented by $E_x = 0, E_y = 2.5\dfrac{N}{C}cos\left[\left(2\pi \times 10^6 \dfrac{rad}{s}\right)t – \left(\pi \times 10^{–2}\dfrac{rad}{m}\right)x\right], E

The electric field part of an electromagnetic wave in a medium is represented by $E_x = 0, E_y = 2.5\dfrac{N}{C}cos\left[\left(2\pi \times 10^6 \dfrac{rad}{s}\right)t – \left(\pi \times 10^{–2}\dfrac{rad}{m}\right)x\right], E_z = 0$. The wave is

Moving along –$x$ direction with frequency 10⁶ Hz and wavelength 200 m

Moving along $y$ direction with frequency 2π × 10⁶ Hz and wavelength 200 m

Moving along $x$ direction with frequency 10⁶ Hz and wavelength 100 m

Moving along $x$ direction with frequency 10⁶ Hz and wavelength 200 m