A plane e.m. wave travelling along the x-direction has a wavelength of 3mm. The variation in the electric field occurs in the y-direction with an amplitude `66Vm^-1`. The equation for the electric and magnetic fields as a function of x and t are respectively

Options

A. `E_(y) =33cospixx10^(11)(1-(x)/(c))`
`B_(z)=1.1xx10^(-7)cos pixx10^(11)(t-(x)/(c))`
B. `E_(y) =11cos2pixx10^(11)(1-(x)/(c))`
`B_(x)=11xx10^(-7)cos 2pixx10^(11)(t-(x)/(c))`
C. `E_(z) =33cospixx10^(11)(1-(x)/(c))`
`B_(x)=11xx10^(-7)cos pixx10^(11)(t-(x)/(c))`
D. `E_(y) =66cos2pixx10^(11)(1-(x)/(c))`
`B_(z)=2.2xx10^(-7)cos 2pixx10^(11)(t-(x)/(c))`

Answer

D