1. The problem statement, all variables and given/known data In lab, I obtained a single slit diffraction pattern and recorded an image of it. The slit width is known to be 0.000134 m. We are supposed to compare our experimentally-obtained diffraction pattern to the result of taking a Discrete Fourier Transform of the aperture in MATLAB. 2. Relevant equations 3. The attempt at a solution Here is my MATLAB code: E=[-100000:25:100000]; F=zeros(1,8001); for n=1:8001; F(n)=0.000134*(sin(pi*0.000134*E(n)))/(pi*0.000134*E(n)); end; plot(E,abs(F)) Here, E corresponds to spatial frequency (m^-1). I'm plotting the power spectrum as a function of E. Qualitatively, the MATLAB result looks very similar to the experimental result, as one would expect. But can I compare the width of the central maxima? At first, I thought that maybe taking the reciprocal of the width of the central max. of the MATLAB result would yield the same width as I saw experimentally. But then again, I'm not taking into account the wavelength of the light in the code. How could I modify my code to give an accurate comparison?