Alternative Way to Magnify the Pattern of Light Interference and Diffraction
Keywords:
Tilt diffraction screen, Enlarge diffraction pattern, Teaching physics laboratoryAbstract
The experiments of diffraction by using a single slit, and interference by using a double slit, are standard physics laboratory for teaching student. The standard experiment setup uses screen that perpendicular to the laser beam. When using a large size of slit’s gaps, the fringe’s pattern shown on screen would be very small and not easy to be measured by naked eyes. In this paper, we propose an alternative way to set up the experiment, by rotating the screen, this results in more separation of fringes pattern and could enhance the accuracy of displacement measuring. The approximate solution also provided. The experiment results are satisfied with the error of less than 6%. The method also makes experiment of using a large slit becomes possible.
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