The electric field of an electromagnetic wave in free space is given by E =10 cos (10^7 t+k x) j V / m, where t and x are in seconds and metres…

The electric field of an electromagnetic wave in free space is given by

$\displaystyle \vec{E}=10 \cos \left(10^7 t+k x\right) \hat{j} \mathrm{~V} / \mathrm{m}$, where $\displaystyle t$ and $\displaystyle x$ are in seconds and metres respectively. It can be inferred that

The wavelength $\displaystyle \lambda$ is $\displaystyle 188.4$ m

The wave number $\displaystyle k$ is $\displaystyle 0.33 \mathrm{rad} / \mathrm{m}$

The wave amplitude is $\displaystyle 10$ V/m

The wave is propagating along $\displaystyle +x$ direction

Which one of the following pairs of statements is correct?