Refraction of Light

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York University *

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Physics

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Dec 6, 2023

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Data Table 1 Initial Angle (°) θ 1 (°) θ 2 (°) sin θ 1 sin θ 2 n 2 Percent Error 10 10 7.5 0.18 0.13 1.21 1.5% 20 20 15 0.34 0.26 1.31 1.5% 30 30 22 0.50 0.38 1.32 0.8% 40 40 29 0.64 0.48 1.33 0% 50 50 35 0.77 0.58 1.33 0% 60 60 41 0.87 0.65 1.34 0.8% 70 70 45 0.94 0.70 1.32 0.8% 80 80 47.8 0.99 0.74 1.32 0.8% Known Index of Refraction 1.33 • Graph the index of refraction by plotting sin θ 1 over sin θ 2 and determining the slope of the line.

• Try repeating the experiment with the dish empty. What is different about the refraction of the light passing through the empty dish from the refraction of light passing through the dish filled with water? - The difference in the refraction of the light passing through the empty dish vs the refraction of light passing through the dish filled with water is that when the empty dish the light is passing more quickly. Since the light only has to pass through the dish it is passing more quickly than it would if the dish had water. As well as reflecting differently. • What would happen if the water in the dish were replaced with a denser liquid? What would be different about the refracted angle? - If the water in the dish were replaced with a denser liquid the refracted liquid would be closer to the line as well as the light would look different and bend more. • In the juice and wine industry, a device called a refractometer is used to measure the sugar level in juice. How would the refraction of light be used to determine the sugar content of a solution? - The refractometer is used to measure the sugar level in juice using refraction. Refraction is when, “light enters a liquid at an angle it changes direction .” So, since light will refract more when travelling through a liquid that has dissolved/suspended solids it can be used to determine the sugar content on a solution. References

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What is a Brix refractometer, and how do they work? OroCommerce. (n.d.). Retrieved May 2, 2023, from https://www.instrumentchoice.com.au/news/what-is-a-brix-refractometer-and-how-do-they-work

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