![]() This atom is fall back to the lower energy state by emitting a photon called spontaneous emission. An adequate amount of energy from the photon interacts with the atom, causing the atom to jump from lower energy state to higher energy state. The principle behind the LASER revolves around three things those are absorption, spontaneous emission, and stimulated emission. The wavelength of these lasers is varied into different spectrums like visible, infrared, and ultraviolet. In this, the source of photons is amplified into a beam of light. ![]() It is a device that controls the emission and absorption of the photons by pumping sufficient amounts of energy. This produces a strongly focused light of very high power of the order of 1000 to 1 million times greater than a typical bulb light. the waves do not interfere with each other. It consists of synchronized troughs and crests, i.e. A LASER (Light Amplification by Stimulation Emission) beam is a uni-directional strongly focused light unlike the one from a simple bulb.
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