plasma tvs
Why doesn’t plasma melt things like plasma TVs and glass spheres that I saw one in?
I learnt that plasma is something simple like super heated ions. Either there is something about the TVs and the glass sphere that is special, or that is isn’t actually super heated…
The temperature of the plasma can be somewhat misleading. While the electron temperature in a neon light is on the order of 6000 degrees C the ions are at roughly room temperature. Even though the electron temperature is very hot the specific heat of the plasma is rather low, this means that for a given volume of plasma, the energy necessary to make it hot is very small. This is similar to how you can hold you hand over a flame that is hundreds of degrees and it doesnt really hurt however if you have hot cooking oil splash on you it hurts really bad. The cooking oil and the flame are about the same temperature but the amount of energy that can be transferred is higher in the case of the cooking oil.
So even though the plasma globe has hot plasma touching it not enough energy is transferred to the globe for the glass to get hot.
Also plasmas can exist at essentially absolute zero (~10^-5 K) so they dont really have to be hot.
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VideoSecu MF607B Mounts Tilt Wall Mount For most 32"- 55" Plasma LCD TVs Monitor Flat Panel Screen Display VESA Up to 700x400 1QH Sale Price: $15.99 Average Rating:   |
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