Exposure to the very high intensity electromagnetic fields found in the immediate vicinity of certain sources such as radar installations and TV or radio transmitters can produce electrical shock or a variety of heating effects, which may range from a sensation of warmth to burns and eventual cataract formation.
S 1 is a vertical, perfectly inelastic, supply curve. This represents 'momentary' supply. In most industries, if a firm was asked to produce a large order immediately, it simply would not be able to do it, regardless of the price offered for the order. Supply is perfectly inelastic in the very short run.
Economics textbooks depict the demand curve for a perfectly inelastic good as a vertical line, because the quantity demanded is the same at any price. Supply could be perfectly inelastic in the case of a unique good such as a painting. No matter how much consumers are willing to pay for it, there can never be more than one original version of that painting.