52. Two glass plates are arranged so that light reflected from the bottom surface of the top plate interferes with light reflected from the top surface of the bottom plate. Moving along the x-axis, the total reflected intensity alternates between bright and dark fringes. There are 25 bright fringes across the entire width of the plates. Determine the plate spacing at the right edge. Assume that the source of illumination is blue light with a wavelength of 420 nm. (10.1) T/I