Single Slit Diffraction

Given: - Slit width - Distance to screen - Wavelength \underline{(I) First Order Minimum:}
For single slit diffraction, the minima occur at: For small angles, , Distance of first order minimum = \underline{(II) Second Order Maximum (Approximate):}
Secondary maxima in single slit are not sharp and lie approximately midway between two minima. So, second order maximum lies roughly between 1st and 2nd minima: Distance of second order maximum