Kirlian Photography. It is named after Semyon Kirlian. In 1939 he accidentally discovered that if an object is place on a photographic plate and then connected to a high-voltage source, an image is produced on that photographic plate.The technique (also known as electro-photography, high voltage photography, radiation field photography or corona discharge) obtains a photographic image due to the high-energy interactions between the subject & an applied electric field. No external light source is used in Kirlian photography. Light emitted as photons from the electrical interaction causes the image to appear on the film. A controversial medical application of the technique involves correlating the physical & mental well- being of a subject with the image variation arising from differences in sweat rate & sweat composition on the skin surface.