Cathode Ray Discharge Tube Demonstration An Exploration (Because of the DANGER involved and the fragile nature of the device, this is a demonstration rather than a true Exploration) Background information: Until recently, almost all televisions used a device known as the cathode ray tube, or CRT, to display the images. In a cathode ray tube, the "cathode" is a heated filament (not unlike the filament in a normal light bulb). The heated filament is in a vacuum created inside a glass envelope or "tube." The "ray" is a stream of electrons that naturally pour off the heated cathode into the vacuum. The Cathode Ray Tube is powered by an extremely high voltage DC current system and is dangerous! Electrons are negative. The anode is positive, so the anode attracts the electrons pouring off the cathode. The electrons hit the phosphorus screen and generate green photons, which we can see. Safety: The cathode ray discharge tube is not a toy and should be handled with a lot of precaution. Ar extremely high voltage powers the cathode ray discharge tube and it's a very dangerous threat for your health if it's not handled properly. In this demonstration, only the peer leader is qualified to handle the cathode ray tube. Observation and Discussion: Discuss what is happening inside the device? Why are electrons moving inside this device? What kind of field is being created inside the tube?
Cathode Ray Discharge Tube Demonstration An Exploration (Because of the DANGER involved and the fragile nature of the device, this is a demonstration rather than a true Exploration) Background information: Until recently, almost all televisions used a device known as the cathode ray tube, or CRT, to display the images. In a cathode ray tube, the "cathode" is a heated filament (not unlike the filament in a normal light bulb). The heated filament is in a vacuum created inside a glass envelope or "tube." The "ray" is a stream of electrons that naturally pour off the heated cathode into the vacuum. The Cathode Ray Tube is powered by an extremely high voltage DC current system and is dangerous! Electrons are negative. The anode is positive, so the anode attracts the electrons pouring off the cathode. The electrons hit the phosphorus screen and generate green photons, which we can see. Safety: The cathode ray discharge tube is not a toy and should be handled with a lot of precaution. Ar extremely high voltage powers the cathode ray discharge tube and it's a very dangerous threat for your health if it's not handled properly. In this demonstration, only the peer leader is qualified to handle the cathode ray tube. Observation and Discussion: Discuss what is happening inside the device? Why are electrons moving inside this device? What kind of field is being created inside the tube?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Question
Transcribed Image Text:Cathode Ray Discharge Tube Demonstration
An Exploration
(Because of the DANGER involved and the fragile nature of the device, this is a demonstration
rather than a true Exploration)
Background information:
Until recently, almost all televisions used a device known as the cathode ray tube, or CRT, to display
the images. In a cathode ray tube, the "cathode" is a heated filament (not unlike the filament in a
normal light bulb). The heated filament is in a vacuum created inside a glass envelope or "tube." The
"ray" is a stream of electrons that naturally pour off the heated cathode into the vacuum. The Cathode
Ray Tube is powered by an extremely high voltage DC current system and is dangerous! Electrons are
negative. The anode is positive, so the anode attracts the electrons pouring off the cathode. The
electrons hit the phosphorus screen and generate green photons, which we can see.
Safety:
The cathode ray discharge tube is not a toy and should be handled with a lot of precaution. An
extremely high voltage powers the cathode ray discharge tube and it's a very dangerous threat for your
health if it's not handled properly.
In this demonstration, only the peer leader is qualified to handle the cathode ray tube.
Observation and Discussion:
Discuss what is happening inside the device?
Why are electrons moving inside this device?
What kind of field is being created inside the tube?
What does the magnet do to the cathode ray, and why does it cause the ray to bend the way it does?
75
Transcribed Image Text:What happens when the magnet is turned over and why?
Why is color being generated?
Make sure you understand whether electrons are green, how electric fields differ from magnetic
fields, why the electrons move, how the magnet affects what is going on inside the tube.
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