The equations of the electromagnetic waves are the solutions of Maxwell’s equations. These are known as the fundamental equation of electrodynamics. There is no medium needed for travelling of electromagnetic waves through empty space. EM waves are generally viewed as linear superposition of the sinusoidal plane waves which are travelling in arbitrary directions. The EM wave which is travelling in the x-direction is given by the form

E(x,t) = Emax*cos(kx – ωt + φ)

Given, maximum electric field in y direction is 33 V/m.

Hence, Emax = 33 V/m and φ = π/2, (as electric field in y direction and wave in x direction or phase shift is 90 degrees)

Also, k = wave number = 2π/λ.

Where, λ = wavelength = 60 mm = 60*10^(-3) m

ω = 2*π*f, f = frequency = c/λ.

Hence, Option B is correct.