Michelson's interferometer played an important role in improving our understanding of light, and it has many practical uses today. For example, it may be used to measure distances precisely. Suppose the mirror labeled 1 in the figure below is movable. If the laser light has a wavelength of 635.0 nm, how many fringes will pass across the detector if mirror 1 is moved just 2.000 mm? If you can easily detect the passage of just one fringe, how accurately can you measure the displacement of the mirror? :inm