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No, there are some cold cathode vacuum tubes. These do not light.
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∙ 9y ago
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How do you find a vacuum leak on a 99 Ford Excort ZX2 that cuts out while idling?
i would try a can of ether pray all vacuum lines one a time. when it ides up then know where the leak is.
Where does the vacuum advance hose hook up to a holley 650?
Any place that has constant vacuum Usually on the back side at the base of the carb.
Where does the gas in light bulbs come from?
Some light bulbs have gases added to them at the time of manufacture. Noble gases help to keep the electrode material from bonding to the envelope (the dark areas that build up near the ends of an aged fluorescent light bulb are causede by this effect). Otherwise, gases enter a lightbulb's envelope via diffusion through the membrane or along the electrode / envelope interface.
Why does the light bulb light up when the banana is in the microwave with it?
Because Microwaves always light up.
Why would a Hayward pool pump develop a vacuum and then within ten seconds the vacuum just stops and the water flow drops?
The pool pump is most likely losing the vacuum due to clogged up filters. The filters need to be checked and cleaned.
What are the characteristics of computers based on vacuum tubes?
Overall, computers with vacuum tubes were not reliable nor did very much. Vacuum tubes took up lots of space and got very hot. The lifespan of vacuum tubes were not much better than incandescent light bulbs, and if a computer had hundreds of these, the odds of one going out soon would be quite high. The vacuum tubes didn't switch all that fast either, and they had to be heated before they could be used, meaning it took about a minute or so before anyone could attempt to boot it.
Is silver deposit inside vacuum tube bad?
Most vacuum tubes have real silver inside. Since silver is going way up. these tubes are becoming valuable
What is a central vacuum system?
The main vacuum unit is usually located in the basement with tubes running throughout the house. The tubes run to each room and have a hinged cover. You insert the hose in the tube and the vacuum unit automatically turns on and you can suck up the dust. All you have to move is the hose and not the main suction unit.
Why does the ENIAC computer give off so much heat?
the eniac and other computers like to give off so much heat because they use thousands of vacuum tubes that took up lots of space and gave a great deal of heat just like a light bulb does.
What is made up of the heart and all the tubes and blood connected to the heart?
The circulatory system includes the heart and all of the tubes connected to it. These tubes are collectively known as blood vessels.
Why would it take hours for an analog television to display a picture after it is switched on?
If it is a very old TV, more than likely it contains vacuum tubes that have gone bad. Vacuum tubes work by deflecting electrons inside a glass tube. This requires the tubes to be heated, with a small internal heater. The tubes have to warm up for them to work. This process should only take a minute or two. If it is taking hours the heaters are bad, or they arn't getting enough power to warm the tubes properly.
Different kinds of energy waves that move at the speed of light in a vacuum make up the?
In any substance, all electromagnetic waves travel at the same speed that light travels through that substance.
How is light different from sound?
Sound is the vibration of molecules and atoms. Light is made up of things called "light quanta" or "photons." This means that sound cannot travel through a vacuum (there are obviously no molecules or atoms in a vacuum to transmit sound) but light can.
What transperent objects can slow the speed of light?
Anything that is transparent i.e. allows light to pass through, can slow the speed of light. The speed of light C is measured in a vacuum at 2.98 x 108 ms-1, if light is able to pass through any object that is not a vacuum e.g. water, this value will be less as the medium is more dense than a vacuum. Light is made up of particles called Photons, which will collide with the particles that make up any medium, slowing them down. Therefore, the only medium in which light can travel at it's maximum speed is in a vacuum, as by definition a vacuum is empty space and there will be no collisions.
Hy did ENIAC give off so much heat?
In 1946two Americans, Presper Eckert, and John Mauchly built the ENIAC electronic computer which used vacuum tubes instead of the mechanical switches of the Mark I. The ENIAC used thousands of vacuum tubes, which took up a lot of space and gave off a great deal of heat just like light bulbs do. The ENIAC led to other vacuum tube type computers like the EDVAC (Electronic Discrete Variable Automatic Computer) and the UNIVAC I (UNIVersal Automatic Computer).
Do they still make vacuum tubes?
Do they still make vacuum tubes? Yes! Vacuum tubes are still used in applications where high power is required. And that's because there are no solid state (semiconductor) devices that can deliver what a hefty vacuum tube can produce. We see vacuum tubes used in the broadcast transmitters that radio and TV stations send out their signals with. We also see vacuum tubes used in radar applications, and in things like X-ray generation. You want big power? Get a vacuum tube to deliver it. As we move up the power scale, we'll see solid state devices falling off the truck until we're left with just vacuum tubes. There's a bit more.Now that newer technology has appeared and is becoming more common, the cathode ray tube (CRT) in "regular" television sets is disappearing. (The CRT is a vacuum tube.) There are still plenty of these "older" units being used and marketed in other parts of the world. But the chances are excellent that you encounter a device using a vacuum tube at least daily. The tube we're talking about is called a magnetron, and it is the vacuum tube (a diode with associated magnets that works as a cavity resonator) which generates the microwaves energy that is used in microwave ovens.Vacuum tubes were developed and advanced long before solid state devices came into being. But, though semiconductor technology is at the heart of almost all electronic equipment around us today, the vacuum tube still does the jobs that solid state devices cannot manage. And this will continue to be the case for some time to come.
What can speed up light?
Travelling through a medium that is optically less dense. Vacuum is best.
