The electric field part of an electromagnetic wave in a medium is represented by
`E_(x)=0,`
`E_(y)=2.5(N)/(C) cos[(2pixx10^(6)(rad)/(m))t-(pixx10^(-2)(rad)/(s))x]`
`E_(z)=0`.
The wave is

Options

A. moving along x - direction with frequency `10^(6)` Hz and wavelength 100 m
B. Moving along x - direction with frequency `10^(6)` Hz and wavelength 200 m
C. Moving along-x - direction with frequency `10^(6)` Hz and wavelength 200 m
D. Moving along y- direction with frequency `2pixx10^(6)` Hz and wavelength 200 m

Answer

D

Explanation

`lambda=(2pi)/(k)`