LASERS BY: NITHIN, JONATHAN, BRIAN, JOHN-MICHAEL AND EMERSON LIGHTLIGHT AMPLIFICATIOnAMPLIFICATIOn STIMULATEDSTIMULATED EMISSIONEMISSION RADIATIONRADIATION
What is a Laser? Light amplification by stimulated emission of radiation A device that produces light of a single colour with all waves travelling parallel to each other Since it is a single color it is a single wavelength You'll find them in everything from CD players to dental drills to high-speed metal cutting machines to measuring systems. Tattoo removal, hair replacement, eye surgery
Amplification of photons – Some of the photons reflect off of mirrors at the ends of the rod, and then collide with atoms, which releases more photons.
PROPERTIES OF LASERS Laser light is monochromatic or very pure in color. Laser light is coherent or special "in-phase" light Coherent mean in same fixed phase and frequency, so the waves vibrate in the same direction at the same time — a laser beam can transfer a great quantity of energy as quanta.
TYPES OF LASERS There are 4 types of lasers: -Depending on the beams power Class 1: Safe Ex. laser pointers, laser printers and disc players Class 4 : More Harmful Ex. Medical lasers, to powerful industrial lasers
How is laser light different from visible light? Laser light is coherent, while light Is incoherent and consists of multiple wavelengths Since it only one wavelength it only has one specific color compared to how light has many different colors. Laser light is directional. Whereas a laser generates a very tight beam, a flashlight produces light that is diffuse. Because laser light is coherent, it stays focused for vast distances. This proves that laser light has more energy.
The End