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Dark fringes for single-slit diffraction

 
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Oct27-10, 05:43 AM   #1
 

Dark fringes for single-slit diffraction

How many dark fringes will be produced n either side of the central maximum if light (its wavelength is 651 nm ) is incident on a single slit that is 5.47x10^-6 m wide?


sin (theta) = m.wavelength/w
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Oct27-10, 03:33 PM   #2
 
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Looks good. Find theta when m = 1. Then for m = 2, and so on until it doesn't work anymore.
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