Using a human hair as a double slit, we attempt to find the width of the hair based upon the
diffraction pattern that is shown.
Part 1: Experiment
A hair was taped onto a card that had a hole punched into it. This hole allows the laser to pass
through while also interacting with the hair to cause a diffraction pattern as shown below.
As we expected, the laser does cause a diffraction pattern. We can use the difference between the
maxima to determine the width of the hair.
Our calculations produce a value of 97 ± 63 micrometers, putting it well within the expected
values. A significant portion of the error is due to the assumption that error in L is 2 cm.
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