A 'plasma' is an electrically charged gas that emits light ( just like lightning only tiny!).
A plasma display makes use of this effect by having a plasma form inside every pixel cell. The light it gives off hits a 'phosphor' chemical at the front of the cell, this will then produce a red, green or blue dot called a pixel.
Plasma screens are becoming common in modern large screen televsions.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Plasma Screen