00:01
Okay, so the magnetic field that is perpendicular, it produces an acceleration perpendicular to the direction of motion.
00:17
So this is given by the force that causes this acceleration is given by m .a.
00:27
Perpendicular being a perpendicular acceleration.
00:31
And so that will be equal to the magnetic field force from the magnetic field, qvb.
00:37
Therefore, acceleration, perpendicular acceleration will be qvb over m.
00:44
So now we use an equation of motion, if you'll remember one of those things.
00:51
So we're going to use distance, d -p perpendicular, this is the deflection distance we want to find, will be equal to initial perpendicular distance, which will be zero, plus initial velocity perpendicularly in the perpendicular direction v .0 perpendicular times t, and that will be zero, plus one -half a perpendicular times t -square.
01:19
So this is a equation of motion defined perpendicular distance using perpendicular acceleration, and so we're left with one -half -a -perpendicular times t -square.
01:29
So plugging in a perpendicular, you have one half times qvb over f times t squared...