PLEASE SOLVE THESE AND TYPED THEM ON YOUR COMPUTER. If for some questions you can't draw with your computer, just explain in words what your drawing would look like.

w Aplarenfglase(n=l.5)isplacedoveraat m plate of plastic (in = 1.2). A thin lm of air is . Thin lm trapped between the plates. as illustrated in the ofair diagram at right. Light of wavelength A = 600 nm is incident vertically from above. The locations of the dark and bright hinges. as viewed from above. are A indicated in the top View diagram at right. I. Are the plates in conmcl at point A (where the plate appears dark) or at 8 point D (where the plate appears bright)? Explain your reasoning. If there is not enough infonnation to tell. state that explicitly. C D Top View of plates 2. Points B and C on the top-view diagram above indicate the locations of adjacent bright fringes. Consider the point at which the air lm is thicker. How much thicker is the hn at that point than at the other marked point? Express your answer in millimeters. Explain. 3. Suppose that the lm of air between the plates were replaced with a lm of water (n = 1.33). a. If this change wore made. would a bright are dark fringe be seen at the point where the ma plates are in contact? Explain. b. If this change were made. would adjacent bright fringes be closer togedrerjanher apart, or in the same location: as before? Explain