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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).
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Why does a cathode ray tube have low pressure inside?
Low pressure inside a cathode ray tube? How about nopressure inside the tube! 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.
Are Fluorescent and LED lights the same thing?
NO. Fluorescent lights and LEDs are NOT the same thing, other than the fact that they both produce light. A fluorescent light consists of a glass tube or envelope with a powder [phosphor] coating on the inside of the glass which when "excited" by electrical energy created by current running through a gas, also inside the envelope, releases some of that energy in the form of light. An LED on the other hand is a solid state device with no tube, phosphors, or gas. It also converts electrical energy to light but by the interaction of two dissimilar electrically conductive compounds inside of a transparent or translucent plastic body.
What kind of carbine is Willem Dafoe using at the end of Clear and Present Danger?
a total custom 'hollywood' version of an M-16 carbine variant .223 cal. there is no forearm cover and the gas tube is exposed, also no stock and a real short recoil tube poking out the back - it just doesnt look anything like an M-16 so it confuses people. Pantera arms will probably take the credit.
What kind of gas escape the plant in Bhopal India?
methyl isocyanate
What kind of metal is helium?
Helium is no metal, but a gas (at room temperature at least).
