Temperature depends on the average kinetic energy of the particles in a sample. How does this help explain why a plasma-based light does not have a high temperature?

A plasma light can contain a few fast, energetic particles, but most of its particles are heavier and move more slowly. Because temperature reflects the average kinetic energy of the particles, those slower particles keep the overall temperature low; the plasma is also very low density. So the best choice is “Most particles in the plasma are heavy, slow, and very low density.”

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