Chapter 16 WebLab#2 “Diffraction and Interference” Part I: Interference after diffraction through a single slit. * Go to the following website: http://www.physics.uoguelph.ca/applets/Intro_physics/kisalev/java/slitdiffr/ * Adjust the vertical slider bar on the left to change the frequency of the light passing through the slit. Observe the changes in the diffraction pattern on the right. Where the graph is “biggest” (farthest to the right) is where the light is brightest. * Move the mouse and “grab” the slit. Adjust the width of the slit, and observe the resulting pattern. Questions: 1)If the slit were relatively wide (say 10 cm wide) what sort of pattern would “common sense” predict you would see? 2)What effect does increasing the wavelength have on the pattern? How does the number and location of the bright spots change? 3)What effect does increasing the width of the slit have on the pattern? How does the number and location of the bright spots change? 4)What color diffracts the most?
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