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A Cathode Ray Tube (CRT) is found in a Computer Monitor and is the most expensive part. Within the CRT are three electron guns, Red, Green and Blue. Each of these guns streams a steady flow of electrons left to right for each line of your monitor. As the electrons hit the phosphors on the CRT, the phosphor will glow certain intensities. As a new line begins the guns will then begin at the left and continue right, these guns will repeat this process sometimes thousands of time until the screen has been completely drawn line by line. Once the phosphors on the CRT have been hit with an electron they will only glow for a short period of time, because of this the CRT must be refreshed which means the process will be repeated.
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Difference between UV valve and XV valve?
XV is shutoff valve UV is under control valve
Does galvanised steel reflect uv rays?
no no
How does fluorescent tube glow?
A fluorescent lamp is a glass tube containing some mercury vapor, with a phosphorescent coating on the interior surface of the tube.The mercury vapor is made to glow by using a high voltage across its electrodes that sets off an electric arc discharge in the tube. The discharge can also be described as a conducting plasma.The resulting flow of current through the mercury vapor is stable and well-controlled by an external ballast, or loading device, which consists of a high-inductance choke-coil that is connected in series with the tube.The continuing dischange glow is invisible to the human eye but it causes the phosphorescent coating on the interior surface of the tube to emit visible light.A fluorescent tube lamp works by using the fluorescence principle. It contains two filaments, one at each end of the tube, which glow to heat up the gas contained inside the tube.The inner surface of the tube is coated with compound of elements having fluorescent properties, such as phosphorus. When it was manufactured all normal air was removed from the tube. In place of the air just a small trace of a gas is put into the tube, such as mercury vapor (for a white color), carbon dioxide (for green), neon (for red color), etc.When the electrical supply is turned on, what happens is that the two filaments glow and then the contacts of the starter open. This action provides a voltage across the tube that is high enough to ionise the warmed-up gas inside the tube. This ionised gas, also called a "plasma", excites the special fluorescent coating on the inside of the tube so that it gives out visible light.Note about the need for a choke and a starterWithout a high inductance choke in series with the tube, the plasma in the tube would simply short-out the service wires. That would always cause the circuit's protective fuse to blow - or its circuit breaker to trip - to cut off the supply of current to the tube. If that happened the tube light would never be able to perform its intended purpose, which is to continue running - and giving out a continuous light - for long periods of time.The starter is a special kind of switch: its contacts are made of a metal alloy which, soon after a voltage is applied, heats up and bends, causing the switch contacts to open.So a high-inductance choke must be used in circuit with the starter and the tube for two reasons:firstly the choke generates a high voltage pulse across the tube when the starter's contacts open. That pulse causes the gas in the tube to ionise and become a low-resistance plasma andsecondly, because it is wired in series with the tube, the choke greatly reduces the current drawn by the tube once it contains the low-resistance plasma.For more information see the Related link below and the answers to the Related Questions.
What is UV resistant?
All silicones are UV resistant. Silicones are synthetic compounds of varies forms. Silicones have many different uses because there are so many different kinds.
Where can you buy a UV sensing chip Like the UDT-455?
UDT Sensors, Inc.
What kind of gas is inside tv picture tube?
There are two main types of lights that are typically tube shaped:"neon lights" - these use mixtures of noble gases (e.g. helium, neon, argon, krypton, xenon) to produce different colors. These are usually used for advertising signs for businesses.fluorescent lights or UV lights - these use mercury vapor to produce UV light (in fluorescent lights a thin coating of a fluorescent powder transforms the UV light to visible light).
What is a type of ultraviolet ray abbr.?
uv ray dude
If a UV ray gets into your skin then you put sunscreen what happens to the UV ray?
Nothing will happen. UV rays are reflected after putting sunscreen.
Does all Ray - ban sunglasses have UV protection?
Yes, all Ray Ban Sunglasses have UV Protection. Look for CE mark on Ray Ban Sunglasses which indicates 100% UV protection.
What is a uv ray absorber?
Ozone absorbs UV rays. It is present in stratosphere.
Do RayBan block UV?
Yes, Ray-Ban sunglasses do block UV.
What is a uv ray in stratosphere?
UV rays are high energy rays. They are released from the sun.
What keeps uv ray from warming on earth?
The ozone layer does that. It absorbs the UV rays of the sun.
How does the fluorescent lighting work?
ionized Mercury vapor emits UV light.phosphor coating on inside of tube absorbs UV light and emits visible light.visible leaves tube.
Flashlight emits what type of ray?
UV (Ultraviolet)
What does UV ray absorption mean?
UV rays are harmful rays of the sun. They are absorbed by the ozone layer.
Why do UV tubes glow blue even though UV radiation is invisible to the human eye?
A UV tube gives off some blue light as well as UV radiation :)
