Write an expression for a P-state lightwave of angular frequency and amplitude E 0 propagating along

Write an expression for a P-state lightwave of angular frequency ω and amplitude E₀ propagating along a line in the xy‑plane at 45° to the x-axis and having its plane-of-vibration corresponding to the xy-plane. At t = 0, y = 0, and x = 0 the field is zero.