The Charge to Mass Ratio (q/m) of a Cathode Ray (electrons) - LD Industries Physics 30

Let me start by stating that there are some liberties taken here to make this topic accessible for first time students: to start with, the glass tube is not a perfect vacuum. The fact that we see light is due to the presence of some air left in the tube and the excitation of the electrons in the atomic structure of those air atoms. Also, electrons were also proposed before J.J. Thomson performed the charge to mass ratio experiment on cathode rays, but his work was an important step in solidifying an electron model of electricity. Still, I hope you find this video a good introduction to some of the physics behind the phenomenon as it is explained in Physics 30.

[@escudeiro6985]

Excellent video. This channel deserves to get big

[@rmahaffy]

Sure do love seeing that vacuum pump winning best supporting actor once again!

[@paytynw7415]

Sad this wasn’t up before our physics diploma