I watched a video on youtube about double slit and it said that when we try to observe electrons it starts to act like a particle but what are these observers that they use? they're shooting one electron at a time so how can they detect them while they're moving in front of the observer?


An observer is you or someone looking at the electron. It can also be a detector or camera taking pictures etc. it is wrong to think that the mind of a conscious observer will cause an observer effect. The thing is if you look at an electron as it's traveling through the slits you will affect it's a trajectory because you physically interfered with it. In order to see the electron photons need to interact with it and they will affect its path causing the overall interference pattern to be disturbed.

  • $\begingroup$ how close the observer should be? $\endgroup$ May 24 '17 at 16:20
  • $\begingroup$ Distance doesn't matter as long as you can observe. $\endgroup$ May 24 '17 at 16:27
  • $\begingroup$ Would a camera taking pictures actually be able to see moving electrons? What is an example of a detector in a real example of such an experiment? $\endgroup$
    – B T
    Sep 8 '17 at 3:00
  • $\begingroup$ @BT a device or instrument designed to detect the presence of a particular object or substance and to emit a signal in response. The problem with detecting electrons is you interfere with their trajectories. $\endgroup$ Sep 8 '17 at 5:49
  • $\begingroup$ You just defined "detector". I was curious what an example would be. $\endgroup$
    – B T
    Sep 13 '17 at 7:08

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.