MY NOTES Three types of charged particles, lets call them A, B,
and C, are accelerated and then pass through a velocity selector so
that we know they have the same velocity, moving to the right. They
then enter a region where the magnetic field is pointing into the
paper. Particles A and B are deflected upwards, as shown, while
particle C is deflected downwards. The paths of the charges in the
field are arcs of circles with the radii...