Phase change occurs when a light ray is reflected by a medium of higher refractive index. When the ray from the air (refractive index = 1.00) is reflected by oil, a phase change will occur.
1. Follow these steps to solve this problem: A very thin oil film (noil = 1.25) floats on water (nwater = 1.33). What is the thinnest film that produces a strong reflection for green light with a wavelength of 500 nm?
2. As light travels from air into the water through the oil film,
a. both of the reflected waves undergo a phase change.
b. neither of the reflected waves undergoes a phase change.
c. only one of the reflected waves undergoes a phase change.
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the !! Thin-Film Interference concept. If you need more !! Thin-Film Interference practice, you can also practice !! Thin-Film Interference practice problems.
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Based on our data, we think this problem is relevant for Professor Al-Binni's class at UW-SEATTLE.