spacecase0

I wanted to see the color of water vapor, it had been so long that I could not remember it,
and it is not like I don't have the things to set it up,
so I put a dash of water in a canning jar, then vacuumed out all the air and some of the water (the water was boiling for a bit when I turned off the pump,
the lid to the jar self seals,
and I electrified it !

look for the arc inside the jar.

the vacuum pump is from harbor freight tools, they are used to fix air conditioners in cars,
the adapter to the canning jar is made by "food savers"
and the hand held tesla coil is Violux (and is very old and I could not find a thing about it on the internet )