A source of light is suspended at height h = 1 cmabove a mirror as shown in the figure (not to scale).The source produces waves of wavelength 500 nm.A viewing screen is placed at distance L = 100 mfrom the source. Rays from the source can reachthe viewing screen either directly or indirectlythrough reflection, as shown. An interferencepattern is observed on the viewing screen.Calculate the distance y to the first dark fringeabove the mirror.Viewing screenSourceMirror

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The following problem must be solved taking into consideration the modification given below: A student holds a laser that emits light of wavelength 545 nm. The laser beam passes though a pair of slits separated by 0.500 mm, in a glass plate attached to the front of the laser. The beam then falls perpendicularly on a screen, creating an interference pattern on it. The student begins to walk directly toward the screen at 2.00 m/s. The central maximum on the screen is stationary. Find the speed at which the 5th-order maxima changes its position on the screen. Do not use small angle approximation. Modification: Suppose there is a liquid in the space between the slits and the screen. Give such liquid any refractive index you desire (numerical value). Also suppose that the screen has a finite lenght (give another numerical value). Besides calculating the speed at which the 5th-order maxima changes its position on the screen also calculate the initial value of bright fringes according to the…
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