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Unformatted text preview: Do not look directly into the laser aperture. Direct eye contact with the laser
beam at close range may cause eye damage. The laser is ﬁxed on an arm that rotates around the center of
the pan and ensures that the laser shines through the center of the acrylic. Measure the angle between the
incident laser beam and the normal to the surface of the acrylic block – this is the angle of incidence, θi .
Measure and record this angle, then measure and record the angle of refraction, θr . Repeat this procedure
with the laser at several different angles and record your results.
Make a plot of sin θr vs. sin θi for each of your measurements. You should notice that the points form
a straight line. Determine the slope of this line. What is the physical signiﬁcance of this slope? Determine
the index of refraction of the acrylic block using your slope. Hint: Use Equation 2. 5 Experiment: Brewster’s Angle This experiment will use a different technique to determine the index of refraction of the acrylic used
in these experiment...
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This document was uploaded on 02/15/2014.
- Spring '14