Cathode Ray Tube (Amanda Hrezo)
Author
Amanda Hrezo
Principles
Repulsion and Attraction
Atomic Structure
Atomic Models
Standards
HS-PS1 Matter and Its Interactions
Materials needed
Strong Magnet
Cathode Ray Tube
Tesla Coil
Procedure
1. Setup cathode ray on stand
2. Plug in Tesla coil
3. Push and hold the power button for the tesla coil.
4. Move the tesla coil towards the negative end of the cathode ray tube (Do not touch the tesla coil to the cathode ray)
5. Once there is a strong ray, use a magnet to show how the ray moves in response to the positive and negative side of the magnet.
Explanation
The cathode ray tube is a glass tube with a vacuum inside of it. Meaning there are not particles inside the tube. On one end is a cathode (-) and the other end an anode (+). Electrons from a tesla coil move through the cathode side to the anode side of the tube. There is a coating on the tube and when it is struck by electrons it glows.
The magnet can attract or repel the ray of light due to the idea that opposites attract. When the positive side of the magnet is towards the ray; the ray will bend towards the magent. WHen the negative side of the magnet is towards the ray it will move away from the magnet.
Questions
What might be creating the ray of light? Electrons
What direction does the ray of life seem to be traveling? Towards the positive side
If the positive side of the magnet is towards the ray, how does the ray move? Towards the magnet
What charge does the ray have then? Negative
Everyday examples of the principles illustrated
- Older Televisions and Computer Monitors
Photos
Include photos that you have taken. Do not embed the photos in this website as it will run out of memory quickly. Put the photos in the appropriate album. Insert the photos by addressing their URL from the insert graphic function.