I'm not sure where to place this, so please forgive me. As you know, an electron experiences a force of F = qVxB in a magnetic field and equating this to centripetral force, we can find the radius of the electron's path to be R = mv/qB Ok, that's simple enough. Now, I want to model an electron via 3D graphing in a magnetic field. For this, I need to model every part of its trajectory. This is proving tricky. Say we have: Bx = 0 By = 0 Bz = 1 micro tesla The initial electron is coming in at Vx = 0 Vy = 1.5e8 m/s Vz = 0 The cross product is Fx = q(VyBz - ByVz) Fy = q(VxBz - VzBx) Fz = q(VxBy - VyBx) Now the acceleration is just a = F / m However, For ax I'm getting 4.23e13 m/s^2! which is a wee bit high. Ok, just plain wrong. How would you generate an animation of an electon in a magnetic field? I would like to extend it so the magnetic field osccilates and varies with amplitude versus time.