I have been trying to understand the result of the double slit electron experiment I’m still not clear abt the result of the experiment. I have seen the Dr. Quantumm - double slit experiment video(). Its very simple explained. it says when an measuring device is placed to look through which slit the electron passes when electron are shoot one at a time, it then doesn’t created an interference pattern but two band of lines but I have also read that when electron fired one at a time they randomly strike at the screen and produces the same interference pattern like a wave. So which is correct??? Also, does a electron travel in a straight path like a bullet when acts like a particle or it travel randomly when fired one at a time? Thanks.