CRT's, high power applications such as transmitter final stages, photomultipliers, etc.
Vacuum tubes still find uses where solid-state devices have not been developed, are impractical, or where a tube has superior performance, as with some devices in professional audio and high-power radio transmitters. Tubes are still produced for such applications.
No, there are some cold cathode vacuum tubes. These do not light.
The vacuum tubes themselves may well be impervious to an EM pulse, but the wiring of their circuits will still collect EM energy, and thus be present in the circuit. However tubes will be more immune than semiconductors because of the voltages involved.Having said that, a large electrical storm (geomagnetic Storm) in Canada burnt out some of the power grid, so it is all relative. 13 March 1989. this particular storm caused auroras to be seen as far south as Texas.
red lights, lasers, vacuum tubes, some TV tubes, etc.
You don't, there aren't any. However some radios in the early 1950s did use both vacuum tubes and transistors. This was because early junction transistors were too slow to operate at RF so vacuum tubes were used in the RF and IF sections. These radios were called hybrid radios because they used both vacuum tubes and transistors.
Neon signs, and vacuum tubes, wave meter tubes, and helium neon lasers.
Actually three special purpose vacuum tubes were specifically designed for microwave usage and are in some cases still the least expensive way to work with high power microwave signals.These vacuum tubes are:cavity magnetron (first designed in WW2 for use in military RADARs, still used in some RADAR systems and as the microwave radiation source in all microwave cookers)klystron (still used in satellite communication, medical microwave equipment, and particle accelerators)traveling wave tube (still used in satellite communication, RADAR systems, and the electromagnetic compatibility (EMC) testing industry for immunity testing of electronic devices)
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.
Vacuum tubes are typically evacuated of gases to create a vacuum inside. However, some specialized vacuum tubes may use inert gases like argon or neon to improve performance or provide specific characteristics.
Neon is used in red lamps, lasers, vacuum tubes.
the cathode ray tube in an older TV or monitor. valves (vacuum tubes) in older radios or stereos. some stereos and record players are still made with for those who wish. Fluorescent tubes and incandescent bulbs are made with a low pressure not quite a vacuum.
Thermionic emission is commonly used in devices such as vacuum tubes and cathode ray tubes to generate and control electron beams. It is also used in some types of electron microscopes, x-ray tubes, and microwave tubes. Additionally, it is utilized in some types of detectors and ionization gauges.