• as light travels from air into the water through the oil film,

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  • the light refracts as it enters the oil and then is refracted again as it enters the water. This combination of two refraction causes a rainbow effect on the surface of the oil as the colors of the spectrum of light disperse into its component colors.

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      Louis Yang

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  • its speed decreases due to the increased refractive index of the medium. As light passes through a material, it slows down slightly as it encounters and interacts with the molecules that make up the material. Light travels more slowly in denser materials like water, oil or glass than it does in less dense materials like air.

    • Answered:

      Deegan Evans

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