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Arago's (Poisson's) Spot
Purpose:A non-intuitive illustration of the wave theory of light.
Procedure:Point the setup at the screen (the farther away from the screen, the better).
Hints:The razor edge and the Poisson spot are on the same mount.
In room 203 use a regular camera and #4 light setup to project the diffraction pattern on the big screen.
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