Dim lights in order to make the electron beam more visible. Wire up the heater and accelerator contacts (and also deflector contacts, if desired) on the tube to the power supply (or supplies). If ...

It might be too soon to consider the innards of the old CRT monitor at the back of your closet to be something worth putting on display in your home or workshop. For that curio cabinet-worthy appeal, ...

On a cold morning on January 25, 1947 at the U.S. Patent Office, Thomas T. Goldsmith Jr. and Estle Ray Mann submitted an invention that is now recognized as one of the earliest examples of the video ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

Click to open image viewer. Replicas of Cavendish Lab. Apparatus (5, l. to r.); obj. ID no. EM.N-08013-A Thompson's cathode ray tube #2, EM.318206 Thompson's cathode ray tube #3, EM.N-08019 Rutherford ...

Then, in 1895, the German physicist Wilhelm Röntgen was tinkering with a vacuum tube that had two electrical connections, known as cathodes, attached to it. When he ran an electric current through the ...