As shown by the history of light, photons participate in most atomic and molecular interactions. Recent biophysical research has measured low light impulses, so-called biophotonic emission, in cells and biological tissue. It is reported throughout the world that all cells (plant, animal or human) emit a weak, so-called biophotonic radiation. Based on the photoelectric effect, appropriate photomultiplier systems have been developed in order to detect this very weak light. Although the emission is extremely low in mammalian cells, it can be efficiently induced by light leading to delayed luminescence or light induced ultraweak photon re-emission. Re-emitted photons in cells are coupled with radical reactions and are probably also linked with the DNA as an important source. In recent years, cell culture models for biophotonic measurements using fibroblastic differentiation were generated and were used as an example to test the growth stimulation efficiency of various bone cell growth factors. It is well known that fibroblasts play an essential role in skin aging, skin carcinogenesis and wound healing. Therefore the biophotonic model of cells provides a new and powerful non-invasive tool for the development of new strategies in aging research.
History of LightThe high importance of electromagnetic radiation for human life is well known. Following winter season, life on our earth retrieves vitality in early spring mostly by the sunrays reaching the ground. When white light enters a prism, it will divide into the well-known spectral colours: From red to orange, followed by yellow, changing to green as well as blue and finally showing the violet dye. The scientist Isaac Newton (1642-1727) noticed this already in his mid-twenties [1]. This observation indicated that white light was a composition of the rainbow colours. Johann Wolfgang von Goethe (1749-1832) confirmed this discovery. The light spectrum is not exclusively detected in the rainbow. In the action of forging one can notice that iron, once it is heated by the fire, switches colours from dark to bright red. It ultimately alternates at last into white. Although not combustible, solid matter behaves in this manner. From this observation, it is clear that long-wavelengths appear at lower temperatures. As the temperature elevates, shorter wave-lengths are noticed until all wave-lengths are present in the incandescent substance. Examinations on extremely hot stars have demonstrated that long wave-lengths steadily vanish and the colour changes into the blue spectrum range. The quantum theory of light is based on the scientific findings of Max Planck (1858Planck ( -1947 as well as Albert Einstein (1879Einstein ( -1955 and clarifies the nature of light [1]. They demonstrated the particle-and wave-like qualities of light. In 1803, the scientist Thomas Young (1773-1829) showed evidence of interference patterns in visible radiation [1]. His experimental testing demonstrated that visible radiation is based on waves. This has already been shown by Christiaan Huygen...