2. A plane-wave is illuminating a screen with a rectangular aperture as shown. a. Derive an expression for the diffraction pattern and Sketch the intensity pattern. b. If W=0.1 mm and L = 0.5 mm and 1=0.5 um and the screen is at a distance D= 2 m, determine the spacing between the maxima of the diffraction pattern along the x and the y- axis. X L W