Fats actually heat up faster than water. Shortwave operates on the same principle as the microwave oven. The coagulation of vascular tissue in the follicle results in a microscopic burn from heat generated. The area of destruction varies with the intensity of the current and duration of exposure. These intense light devices operate within the visible light range and encompass all wavelengths, therefore is white.
Intensified light is reflected, refracted, scattered, resisted and absorbed.
Both pigment and corpusles absorb this intense light because of the different wavelengths. These devices are now being used to treat telangeictasias and hair follicles. The difference in intensified light and ultraviolet is the wavelength. Some intensified light devices have filters to eliminate the shorter wavelengths. This means that all the light is of the same wavelength and is emitted in a column.