A single beam of coherent light (λ = 633·10-9 m) is incident ontwo glass slides (with a refractive index of 1.50), which aretouching at one end and are separated by a d = 0.0213-mm thicksheet of paper on the other end, as shown in the figure. Beam 1reflects off the bottom surface of the top slide, and Beam 2reflects off the top surface of the bottom slide. Assume that allthe beams are perfectly vertical and that they are perpendicular toboth slides, i.e., the slides are nearly parallel (the angle isexaggerated in the figure); the beams are shown at angles in thefigure so that they are easier to identify. Beams 1 and 2 recombineat the location of the eye in the figure. The slides are L = 8.09cm long and D = 1.19 mm thick.
a) At what position does the first bright minimum appear?
