MrFoos

Thanks. Maybe I don't underdstand your reply but it doesn't sound like it answers my question. How do we KNOW whether or not there is an interference pattern unless we are looking? If are looking... doesn't that result in the electron behaving like a particle? So how do we see the interference pattern without "looking" in some way?

Laymen and hobby student of physics here. So the only things I know (or at least think I know) I watch from documentaries. In the test to see if an electron is a particle or wave, they say that if you place a viewer before the slits that the resulting pattern on the back wall is a particle result. But if you aren't placing a viewer before the slit the resulting pattern on the back wall is wave interference. So how is watching the result on the back wall itself NOT placing a viewer thereby always causing the electron to act as a particle? Thank you in advance! Patrick

Ok, serious question from layman. If the universe is expanding... then why aren't we expanding along with it? Are only galaxies expanding? Why not all areas of space... which would include the space our atoms and cells take up. Thanks in advance!