I honestly don't have the time to devote to sifting through articles, dissertations, and poorly maintained university demonstrations just to find an approximate equation for something as common as knife edge diffraction.
Some of the equations that I do see make me shudder (particularly the...
Good day,
I happened across an interesting interactive JAVA applet demonstrating the diffraction of light through a slit. (http://micro.magnet.fsu.edu/primer/java/diffraction/basicdiffraction/index.html" ) Associated with it was the equation,
sin θ = λ/d
where d is the width of the...