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The electric field part of an electromag...

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

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 `2pi xx 10^6` Hz and wavelength 200 m

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The correct Answer is:
B
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