An unknown dielectric is returned from Mars. To determine its refractive index, NASA sends to identical wedged samples (maximum thickness = 2 cm) to two different laboratories for independent interferometric measurements. Both laboratories use a laser with wavelength = 532 nm. One laboratory uses a Michelson interferometer as shown in Fig. 3. The other laboratory employs a Mach-Zehnder interferometer as shown in Fig. 4. In both laboratories, the mirror locations are fixed the wedged shape dielectric is slowly inserted into one arm of the interferometer. In this process, the group using the Michelson interferometer count a total of = 75188 fringes and the group utilizing the Mach-Zehnder interferometer measure a total of = 37594 fringes. Answer the following questions. Do the two groups determine the same refractive index? (NOTE: Calculations are not required here, you can provide a reasoned argument based on the measurement results and interferometer architectures.) 2. What is the refractive index of the dielectric