What two forces were balanced. F = Eq, F =qvBsin(theta) F = mv^2/r, (E = V/d)
v =E/B qvB = mv^2/r q/m = E/(B^2r)
Cathode Ray Oscilliscope
Heater causes emission
The lens bens electrons depending on their distance from the center. The central field has no defection.
TV's have magnetic field coils
