Comment by My_Name

Not if you imagine the single electron going out from the emission point along every path the apparatus allows and back again, forwards and backwards in time, with the whole sequence taking no time at all. Each trip goes through one slit, so the electron goes through both slits on different trips, and the trips combine where they meet at the screen, which gives the fringes (bands). It never turns into a wave and back. It ends up as one dot when one trip doesn’t make it back, because it was absorbed at the screen. The equations of physics are time-symmetric to a very good approximation, and Feynman read antiparticles as particles running backwards in time, so nothing in the maths forbids it. To me it’s the simplest explanation of a lot of “quantum woo”.