Hello, Very recently i learned about the quantum theories and the double slit experiment.. honestly i was startled from what i have seen and heard of the quantum laws known for us at this time.. Well i can't help it but my mind keeps asking zillions of questions and it's not stopping.. :P Before asking anything theorethical i first want to be certain about the results of the experiment. Question 1: What actually happens when the electron hits the screen behind the slit? First case- when no one is observing the experiment the electrons should be in waveform like.. right? Forming disturbance pattern on the screen behind the slit. Second case- when observation is present the electron hits the screen as it was particle like.. Third case- observations were performed just before the waveform hits the screen (not before when the electrons were fired from the electron gun but right before the moment of the hit)- and than suddenly the electron transformed back to particle alike back from waveform like, and as i am informed the electron that was observed in that given moment had particle alike properties just like if it was observed from the very beginning, as if the time turned back and changed it properties as if it was observed from the beagining when the electron gun fired it.. So.. what actually happens here? How did we actually measure the second case scenario? How do we get wave pattern alike on the screen? Becase as i understand the experiment.. when we observe the experiment the electrons are with particle like properties.. so how do we get the wavelength disturbance pattern on the screen? When actually we don't see it?? Or the screen is somehow sensetive? So when we dont look at it the electrons are leaving marks on the screen so thats how we know there is waveform pattern?? I need this question..confirmed.. and i may have a interesting theory :) thanks in advance!