Hello; I have just started my physics GCSE so I am not very learnèd as others. I was thinking about an 'electron wall' - is this possible? I know that you cannot simply have a wall consisting of only electrons, because they would repel each other and it would fall apart. But what if you fired a constant stream of electrons instead? Then the electrons wouldn't repel each other because they'd never be near each other - so what if you had a machine that a constant stream of electrons in a vacuum, such that it was faster than the rate of human movement? Would you be able to put your hand through it? Another question I had - what is the closest distance that two electrons can be apart from each other before repelling themselves? Cheers.