【Daily Question】Theoretical Foundation 2020.06.03
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Multiple-choice question: Flat glass forms an air wedge. Monochromatic parallel light is incident perpendicularly. If the upper surface of the wedge is moved upward, how do the interference fringes change? ( ) (A) The fringes at all levels shift to the left, with the fringe spacing remaining unchanged. (B) The fringes at all levels shift to the right, with the fringe spacing remaining unchanged. (C) The fringes at all levels shift to the left, and the fringe spacing increases. (D) The fringes at all levels shift to the right, and the fringe spacing decreases. Answer: A. Hint: Extra rewards will be given to those who can explain the solution process; the answer can be found in the response!
(A) The stripes at all levels shift to the left, with the stripe spacing remaining unchanged