An electron is a charged particle... A time varying electric field produces an electro-magnetic wave perpendicular to it. So when an electron moves, it should also produce an electromagnetic wave perpendicular to it. Isn't this true? Now if this is true... then should we not be able to detect its presence as it moves around, courtesy this em-wave. Now if we can detect this.. then we should be able to find out its velocity through the shift in frequency and we should be able to detect its position by putting detectors at the right place. Is this wrong?