Thoroughly revised text, expanded with with latest data judiciously... SILENT FEATURE1-Brief introduction to light2-Historical review of laser invention in the world3-Detailed introduction to laser , components, physics, tissue interaction in general & with dental tissues 4-Importance of different wavelength & its use in dental field5-Laser application in all different types of dental field NEW CHAPTER = Recent advances in laser EXTENSIVE REVIEW1- Laser wavelength2-Tissue interaction3-Application to different dental field4- Hazard & Safety of its use