A plane wave with electric field Einc(x, z) = yE 0 exp[ik(z sin x cos ) it] is incident on a perfect

A plane wave with electric field Einc(x, z) = ŷE₀ exp[ik(z sin θ − x cos θ) − iωt] is incident on a perfect conductor which occupies the half-spacex < 0. Find the pressure exerted on the conductor by 

(a) Evaluating the Lorentz force on the currents generated on the surface of the conductor and by 

(b) Evaluating the linear momentum change between the incident and reflected waves.