Figure 1. A ray in air interacts with oil on water at an angle 0. Ray 1 reflects off the air-oil surface, ray 2 off the oil-water surface.Part 1)Consider the normal incidence where 0 = 0. Calculate the phase difference between rays 1 and 2.radiansDo the rays interfere constructively or destructively?(No answer given) +(No answer given)ConstructivelyDestructivelye ray 1 shown in blue (different colour) has length l1. Derive an expression for l1. Do not forget that 0 is small, so your answer must be proportional to 0².your anovrer us un algebraic formula expressed in terms of d, no, and 0. For 0 (type "theta") and no (type "n_o").l1The additional path of the ray 2 shown in green (different colour) has length l2. Derive an expression for l2. Do not forget that 0 is small, so your answer must have a term that isindependent of 0 and another that is proportional to 82.l2 =Part 3)Using the results of the previous parts, find the value of 0 that corresponds to the first interference maximum.Do not forget that ray 1 travels lį in air and ray 2 travels l2 in oil. Present your answer as an algebraic formula expressed in terms of d, X, and no. Oil film of thickness d = 5.06 µm lies on surface of water, as shown in Figure 1. Monochromatic light is incident on the film from air. The wavelength of the light in air is1 = 0.520 µm. The index of refraction of air can be approximated as 1.00, the index of refraction of the oil is n, = 1.54, and the index of refraction of water is nw = 1.33. There aretwo interfering rays, rays 1 and 2, as is shown in the figure below.The incident angle 0 is small, so, for your calculations, you should use the following approximations:sin 0 2 0cos 0 2 1-1cos 012AirOilWaterFigure 1. A ray in air interacts with oil on water at an angle 0. Ray 1 reflects off the air-oil surface, ray 2 off the oil-water surface.Part 1)Consider the normal incidence where 0 = 0. Calculate the phase difference between rays 1 and 2.radiansDo the rays interfere constructively or destructively?(No answer given)

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Answered: Oil film of thickness d = 5.06 um lies…

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