Laser

Check out us at:http://www.tutorvista.com/content/physics/physics-iv/communication-systems/laser-works.php What is a Laser Laser stands for "light amplification by stimulated emission of radiation". Here light is amplified by stimulating the emission of radiation. Radiations are emitted by electrons when they drop to a lower energy level. electrons generally exist at a particular energy level, they absorb energy, get excited and jump to higher energy level, these electrons when they jump back to their original energy level, they emit radiations of a particular wavelength. Laser technology enables us to excite the electrons so they jump to a higher energy level and stimulate them to drop back to a particular lower energy level in order to obtain the required wavelength of the radiation. Please like our facebook page http://www.facebook.com/tutorvista Follow us at: https://plus.google.com/+tutorvista