Has anyone ever "fired" an electron down the center of an evacuated tube (horizontally) to see if the electron follows the same trajectory as a bullet fired from a gun? This might seem like a simplistic question, but I have always wanted to know what would happen.
Mark
I was wondering what should be used as the criteria for a straight line? One suggestion would be the path that a beam of light would take. Another criteria would be that based on inertia. An object in motion that experiences no forces could be considered to be moving in a straight line. This...