This demonstrations shows two slits and a diffraction pattern in the top and bottom panels, respectively. Drag either slit and observer the pattern. Use the mouse to measure position.
Which simulation shows a correct diffraction pattern? Demo 1 or demo 2? Explain.
Assume that the wavelength used in this experiment is 630 nm and that position is measured in units of 10-4 m in the top panel. Diffraction pattern are in units cm. How far is the diffraction pattern from the slit for the correct simulation?
Note: No finite width effect.