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In a cathode ray tube, the "cathode ray" is an electron beam that is used to paint a "picture" on the phosphor coating on the inside of the tube. (We look at the "picture" from the other side of the glass on which the coating is laid down - the outside.) An electron is a lightweight little dude. It weighs about 1/1836th as much as a single proton, so anything, any gas atoms that are in the flight path of an electron will cause it to scatter. That means we need to pump all the air out of the inside of the tube. After we remove all we can, we fire a "getter" (a chemical coated onto a small area inside the tube) which will bind any remaining gas molecules left inside the tube to complete the evacuation process. No more pesky atoms to get in the path of the electron beam and scatter it all over the place.
Kwao Edward
What else can I help you with?
Why discharge tube appears dark at very low pressure?
At very low pressure in a discharge tube, there are fewer gas atoms present to ionize and produce light. This results in fewer collisions and less emission of visible light, causing the discharge tube to appear dark.
Why argon is not used in discharge tube even at low pressure?
The question cannot be answered sensibly because argon is used!
Why is hydrogen filled at low pressure in the discharge tube?
because gases do not conduct electricity under normal pressure so at pressure of 0.1-0.001 mmHg with very high potential difference of 5000 to 10000 volts gases conduct electricity and produce fluorescence on the wall of discharge tube and it also avoid the collision of cathode rays with the positive rays
Why should argon be at low pressure in the geiger muller tube?
Argon is used in the Geiger-Muller tube as a quenching gas to stop the discharge of ions after each pulse. Keeping argon at low pressure allows for efficient quenching of the ionization process. Higher pressure could interfere with the detection process by preventing the resetting of the tube after each detection event.
What are the types of boiler?
fire tube & water tube . high pressure and low pressure. low capacity and high capacity.
Where is the low pressure air conditioner port on a 2001 Chrysler town and country?
There are two aluminum tubes coming out of the compressor. The high pressure tube goes to the condensor in front of the radiator. The low pressure tube is the other tube, and the port has a black plastic cap over it, on the low pressure tube.
Why pressure is low in fire tube boilers?
Hot pressure
In the Thomson experiment to determine the Specific charge of an electron If the pressure in the discharge tube is made is made as low as nearly zero dose conduction takes place?
If the pressure in the discharge tube is nearly zero, there are very few gas particles present to ionize and create a conductive path for the electrons. This lack of gas particles results in very low conductivity and can prevent conduction from taking place in the Thomson experiment to determine the specific charge of an electron.
Why do you use a discharge tube to perform the experiment instead a of light bulb?
It depends on the experiment, of course, but a discharge tube contains ionized atoms, while an incandescent simply has glowing metal. The former is, for most experiments, a lot more interesting.
How do you get low pressure gas discharge?
Low pressure gas discharge is typically achieved by enclosing gas in a container at low pressure and then applying a high voltage across the electrodes inside the container. This high voltage causes the gas to become ionized, creating a glowing discharge. Examples include fluorescent lights and neon signs.
What turbine does not require draft tube?
Draft tube is used to increase the pressure from the low turbine exit pressure to the pressure of the surrounding to which the fluid is rejected.Only reaction turbines require a draft tube as there is low pressure at the exit of the turbine,where as in an impulse turbine the pressure at the inlet and the exit is essentially the same, which is above the pressure to which the fluid is rejected and thus it require no draft tube.
What will happen if the Gas is kept at low temperature and high pressure?
At low temperature and high pressure, the VOLUME of the gas will be reduced.
