Question 5

Air 620 n = 1.00 Oil 7 = 1.47 Water n = 1.33 A puddle of water has a thin film of oil on top of it. For yellow light of wavelength 577 nm in air, the index of refraction of the oil is 1.47 and the index of refraction of the water is 1.33. A beam of this yellow light strikes the oil at an angle of incidence of 62 degrees, as shown above. What is the wavelength of this yellow light in oil? hm Is there a phase shift when the light reflects off the top of the oil? Select an answer Is there a phase shift when the light reflects off the bottom of the oil? Select an answer The yellow light is now incident normally on the oil. Calculate the minimum thickness of oil that gives a maximum brightness for the reflected light. nm