How does a single-slit diffraction pattern differ from a double-slit pattern?

One is a horizontal wave, One is a vertical wave particle inside a horizontal wave.

In the double slit experiment two waves meet and cause an interference pattern. Matter and energy are separate (New Double helix energy theory), energy (electricity) passes through matter , vibrating it into light via electromagnetism. The matter retains energy but the body of the energy wave passes through. Two electromagnetic waves meeting.

The interference pattern is cause by a negative wave end and a positive wave end meeting...They attract each other as they are electrical in nature. The two waves then go into a "flat spin" against each other, causing a vertical wave particle. The energy passes through the matter and the energy retracts as the wave rolls away, then the matter retracts and go into a "galaxy sphere" This video explains it observationally.