Cathode Ray Tubes (CRTs) are the technology behind old television sets, computer monitors, and even some cameras. While they may seem like relics of the past, CRTs still have a fascinating science behind them. In this article, we'll explore how to demonstrate the real-life effects of Cathode Ray Tubes using magnets.

First, you'll need a CRT device, such as an old TV or computer monitor. For the best results, it's recommended to use a device with Helmholtz coils, which allow for varying magnetic fields. If your CRT doesn't have these coils, don't worry – a strong neodymium magnet will still work.

To start, get a relatively still image or video on the screen. This will make it easier to observe the effects we're about to demonstrate. Next, put the strong magnet near the TV screen. You may notice that the image starts to warp and distorts in strange ways. Sweeping trails of color may appear as well.

To increase the effect, try applying a higher magnetic field. This can be done by increasing the current in the Helmholtz coils or by waving the neodymium magnet closer to the CRT. You'll notice that the curvature of the beam increases with stronger magnetic fields.

But here's the really cool part: the energy of the electron beam affects the curvature as well. By turning up the energy, you can demonstrate how the curvature decreases with increasing electron energy. This is a great opportunity to show your audience how the physical properties of CRTs work in real life.

If you don't have access to a CRT device with Helmholtz coils, don't worry – simply waving the neodymium magnet near the CRT will still produce some interesting effects. You may need to adjust the camera settings to capture the results properly, as the beams of electrons can be quite dim and challenging for video equipment.

Overall, Cathode Ray Tubes are a fascinating technology that can be explored in real-life using magnets and simple experimentation. Whether you're a science enthusiast or just looking for a fun project, this experiment is sure to impress!

Cathode ray tubes real life