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Homework Help: Single Slit Diffraction

  1. Oct 22, 2013 #1
    1. The problem statement, all variables and given/known data

    What is the wavelength of the light whose first diffraction max (not counting the central max) falls at 15°,thus coinciding with the first min for red light?Width of slit=2510 nm."
    It is an example problem from Halliday Resnik Krane..In which the they use the principle that max occurs half way b/w two min.and used the angles for two minimas as 10°and 20°.How can u arbitrarily choose two angles?IN this way cant u use 5° and 25°?But then wavelength would be wrong..What is the significance of these two angles :10° and 20°?

    This wasnt a homework question.It was a solved exercise In the Book Physics by Halliday,Resnick,Krane.How can I show my attempt when it is already solved in the book?I just couldn't comprehend the solution fully.So I asked the question..BTW its answer is wavelength violet =430..
    and we use the formula λ'=1/2(2510)(sin20°)=430nm
  2. jcsd
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