Critical Angle of Glass Lab: Is My Graph Wrong?

AI Thread Summary
The discussion revolves around a lab report analyzing the refractive index of a glass block, where the calculated critical angle is 38.3 degrees, while the expected value is 42 degrees. The individual questions the accuracy of their graph and whether the experimental points align properly with a line of best fit. Concerns are raised about the potential error in the graph due to the 4-degree discrepancy. The accuracy of the plotted data and its representation is central to the inquiry. Clarifying these points is essential for validating the experimental results.
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Homework Statement


I'm doing a lab, and I plotted a graph for the refractive index I got about 38.3 degrees
and the material I'm working with is a glass block from reading two textbooks I came to the conclusion my graph might be wrong =/, because the critical angle for glass in air is 42 degrees. So is my graph wrong since I'm like 4 degrees off?
 
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Are the experimetal points lying on a straight line?
 
Yeah I drew a line of best fit.
 
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