Kalics

Basic facts about LASER Laser is acronym for L ight A mplification by S timulated E mission of R adiation. Introduction and History:      Laser is like magic light machine that can cut, drill, weld metals, perform bloodless and painless surgeries, destroy satellites, help in computer use and provide sophistication to almost all phases of life. The discovery of laser changed drastically the scientific and technology world during second half century of 20 th century.     As it is seen that the conventional light obtained from sun, starts, electric lamp, fire, etc. is un-polarized, incoherent, divergent and weak. Hence, researcher focused on getting polarized, coherent, directional and bright light.       In 1917, Albert Einstein predicted theoretically the process of stimulated emission. This process is basic principle of laser. But due to practical problems involved in development practical laser took 43 years. The first working ...