Posts by JD

The Cathode Ray Tube

Cathode rays are streams of high speed electrons moving from the cathode. How a Cathode Ray tube works: A low voltage is placed across the filament. Current flows through and it becomes white hot, this heats the cathode. Thermionic emission occurs at the cathode. Electrons are emitted. There is a… Continue Reading →

The Electron – Physics Chapter Summary

Properties of the Electron It is a particle that orbits the nucleus of an atom. It has a very small mass. It is negatively charged. Charge = e. This is the smallest amount of charge found in nature. It is the indivisible quantity of charge. Millikan first found the value… Continue Reading →