Plasma in a syringe. The small amount of air already in the syringe is what becomes the plasma when supplied with energy via electric current and provided with a sufficiently low pressure environment. Said by Naf5000 in this thread. More science posts here: sixpenceee.com/tagged/science
whaaaaaaaaaaaaaaaaat
SCIENCE, amazes me yet again; this right here is why it’s my favorite subject, this type of wild stuff