00:01
Okay, so we have an electron and it's experiencing a movement in the positive x direction and a magnetic deflection in the negative y direction.
00:14
So first, we want to note that the movement means that there is a positive x direction velocity.
00:27
So it's moving in that direction.
00:32
The velocity is in that direction.
00:35
And then for the magnetic deflection, that means not that the magnetic field is in that direction, but that there is a force.
00:46
So the electron's been deflected in that direction, meaning the force is in that direction.
00:52
So the magnetic force.
01:04
And so with that, we want to take a lot.
01:08
Look at the equation for force, for the magnetic force on a charge.
01:23
So that uses the cross product of velocity and the magnetic field.
01:33
So these are both vectors...