The microwave plasma mystery

From NileRed.

Sometime last year, I got really interested in microwave plasma, which can be made from a lot of things like lit matches, aluminum foil or just some grapes. However, when I went searching for more info about it, I really couldn’t find much of anything. There was also no explanation as to why it was yellow every time, regardless of what it was made from.

So, I decided to investigate this a little bit and try to get to the bottom of it.

Grape plasma paper:

Video references:

Steve Mould:

Veritasium (new grape video):
Veritasium (old grape video):

Applied Science (Ben):
Applied science video on making potassium glass:

Walter Mitty:


Nile Red Shop: