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Unformatted text preview: Light Experimental Results p. Huygens Principle Every point on a wave acts like a point source of an outgoing wave. This idea can explain Youngs expt. p. Twoslit interference pattern The data look like this. p. Twoslit interference pattern Typical picture to illustrate the data. p. Twoslit interference pattern Interpretation of the results: L L L Bright Dark Bright Two slits Screen same distance extra distance /2 extra distance from Fig.357 d p. Diffraction Grating: Many Slits (a) Two slits (b) Many slits. We can still use m = d sin , but using many slits gives sharper peaks than two slits. p. 1 Discrete and Continuous Spectra p. 1...
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 Spring '08
 Hickman

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