b) Determine the state of polarisation described by the following Jones vectors: J_{1}=\left(\begin{array}{l}

7 \\

7

\end{array}\right) \text { and } J_{2}=\left(\begin{array}{c}

14 \\

14 i

\end{array}\right) ii)Write the expression for an arbitrary plane wave (as a function of space andtime). iii)For doing an interference demonstration, a student lets a Helium-Neon laser shine on the same spot of a screen where a Helium-cadmium laser signal converges. The former operates at a wavelength of 632.8 nm, which our eyes perceive as red, and the latter emits at 442 nm (blue). What pattern of interference do you expect? Consider two electromagnetic waves. Give the expressions for their total irradiance I as a function the electric fields E, and E, of each wave. Give also the expression for the total irradiance I as a function of the respective individual irradiances I₁ and 1₂.