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Plasma Laser
What is the meaning of negative resistance (in laser plasma tubes, valves etc.)?
Often you see the phrase associated with high voltage plasma tubes and lasers. I always fail to comprehend the meaning. I guess an increase in the flow of electrons (like a battery) but what about conservation of charge (Kirchhoff's current law), should there not be a deficit elsewhere, is it just that the electrons are accelerated? As you can see i am confused, anyone with any insight into this???
Under some extreme conditions (such as plasma conduction) an increase in the applied votage can actually cause the current to
-decrease-, thus leading to the phenomenon known as negative resistance. You probably aren't old enough to remember vacuum tubes, but 'negative resistance' pentode oscillators were fairly common in the 50's. There is also a device called a 'tunnel diode' or 'Esaki diode' (after Leo Esaki, who invented it) in which increasing the voltage across its terminals will cause a sudden decrease in current. They're frequently used as high-frequency oscillators.
HTH
Doug
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Lightning in the lab: Femtosecond laser generating plasma in air
How much $ will LaserVue save me in power vs LCD, Plasma TV's?
I am reading the new laser tv's consume less than 200 watts, which would be half of some other 65” LCD TVs. 65” plasma TVs can consume more than 500 watts. So what does that mean in savings exactly? Over lets say a year? Tryin to convince my dad to get a laser and not a lcd or plasma.
Hard to say. However, I do know that plasma burns more energy than any other type of TV.
