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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
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∙ 11y ago
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Why discharge tube appears dark at very low pressure?
Not enough gas to support ionization.
Why argon is not used in discharge tube even at low pressure?
The question cannot be answered sensibly because argon is used!
Fluorescent lamp low pressure mercury vapour?
A fluorescent lamp refers to a low pressure mercury-vapor gas-discharge lamp that uses fluorescence in order to produce visible light. It is also called a fluorescent tube.
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
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?
In Thomson's experiment the tube used is evacuated i.e. there is vacuum inside.
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.
What symptoms would be indicative of an oil logged condenser?
High discharge pressure and low liquid line pressure
Where is the ac low pressure side switch on 4.3 Blazer?
It's not a switch. The high pressure runs from the compressor outlet to the orifice tube inlet, and the low pressure side runs from the orifice tube outlet to the compressor inlet.
