DIFFRACTION EXPERIMENT 4Io (two coherent sources) 2Io (two incoherent Sources) 5p 4p 3p 2 A metallic diffraction grating with a 9.5mm diameter post, featuring two micrometer screw slides that form a fineedged double slit at the center of a vertical clamp holding device. It includes an M4 tapped hole at the bottom for mounting and comes with a 9.5mm diameter post. 2 2p 1 1 2.5 2 p 1.5 0 0 0 1 p 0.5 2p 1 0 0 3p 0.5 4p 2 1 1 5p 1.5 2 Io (one source) f m, for maxima 2 m, for minima 2.