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PocketLab Voyager: Double Slit Diffraction Interference & The Wavelength of Light

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Submitted by Rich on Fri, 07/28/2017 - 02:52

A classic way to demonstrate the wave nature of light is to pass a coherent beam of light from a laser through a double slit.  In this lesson, students study the intensity of light in the resultant interference pattern using the light intensity sensor of PocketLab Voyager.  Students also compare intensity to theoretical predictions.  In addition, the wavelength of the light can be calculated from knowledge of slit separation, distances between bright fringes in the interference pattern, and distance from the double slit to the pattern. 

Measuring Fringe Light Intensity on a Computer Screen
Grade Level