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## Homework Statement

Provide an expression in Cartesian coordinates for a plane wave of amplitude 1 [V/m] and wavelength 700 nm propagating in

**u**= cosθ

**x**+ sinθ

**y**direction, where

**x**and

**y**are unit vectors along the x and y axis and θ is the measured angle from the x axis.

## Homework Equations

ψ{x,y,z,t) = Ae

^{i(kx+ky+kz ± ωt)}

k = 2π/λ

## The Attempt at a Solution

im not finding many good examples on this but using the plug and chug method i came up with

ψ = Ae

^{i(.008(cosθ +sinθ) -ωt)}