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Name: Jonathan Tam Class: 12A Phyiscs Experiment Report - Data Processingand Presentation, Conclusion & Evaluation Aim: To find the speed of light in glass using Snell's Law / To prove the Snell's Law Data Collection: Speed of light in air: 299702547 ms-1 (From http://www.what-is-the-speed-of-light.com) Angle of incidence (± 0.5°) Angle of reflection (± 0.5°) 63 37 54 32 42 26 34 22 26 16 25 15 11 8 Data Processing and Presentation: We can simply plug in the values of , and into the equation and get the respective speeds of glass in different experiments. After that we take the average of them. The following values are done in radians. 0.891 0.602 0.809 0.530 0.669 0.438 0.559 0.375 0.438 0.276 0.423 0.259 0.191 0.139 By rearranging the formula, we have: So we need the value of then take the avrage of this ratio and multiply it by the speed of light in air. 0.675 0.655 0.655 0.670 0.629 0.612 0.729 Average: 0.661 Please be aware that this is a ratio which has no units. 0.661 * 299702547 ms-1 = 198063544ms-1 We have the equation , which follows the pattern y = mx. We can plot a graph in order to find the refractive index...

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