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Homework Help: Finding the angular spread of a diffraction minima?

  1. Mar 13, 2017 #1
    1. The problem statement, all variables and given/known data
    Light of wavelength 6000Å illuminates a single slit of width 10-4m. Calculate the angular spread of first diffraction minima.

    2. Relevant equations
    d*y/D = nλ
    Y = nλ/a for minima
    Y = (2n±1)λ/a for maxima
    Y stands for the position on screen, d is slit width and D is separation between screen and slit.

    3. The attempt at a solution
    I understand that the angular spread of any maxima is the difference in the angles subtended by the two minima on either side of it. But what about angular spread of a minima? Is it the difference in the angles subtended by the two maxima on its either side?
  2. jcsd
  3. Mar 13, 2017 #2

    Charles Link

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    Homework Helper
    Gold Member

    Normally the width of the diffraction minima is a problem that is not addressed because there doesn't seem to be a precise answer to the question. Perhaps your instructor can provide further clarification.
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