Question about the physics of mass spectrometryWatch
[EDIT] After a bit of research, it appears that vacuums actually have something called impedance rather than resistance. The impedance of free space is roughly 377 Ohms, but I'm not sure if this relates to mass spectroscopy. Vacuums are also rarely perfect and still contain a small amount of particles, producing a small amount of resistance.
If the positive ions are 'beamed' across a vacuum by high electric potential, then consider this: V=IR, so for there to be electric potential, there must be resistance in the vacuum. CAN SOMEONE EXPLAIN HOW THERE IS RESISTANCE IN THE VACUUM
The ions carry a charge and are free to move through the 'vacuum'*... they are free charge cariers
*not really a vacuum because it has things in it - the things are those ions
if you stop putting charge carriers into a vacuum, vacuum is a good insulator