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Homework Help: Critical Angle

  1. Nov 20, 2011 #1
    1. The problem statement, all variables and given/known data
    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 text books 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?
  2. jcsd
  3. Nov 20, 2011 #2
    Are the experimetal points lying on a straight line?
  4. Nov 20, 2011 #3
    Yeah I drew a line of best fit.
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