OPTI 200 Lecture Notes - Lecture 6: Arc Lamp, National Ignition Facility, Lux
30 Aug 2018
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Look outside ua parking garage for hw 2. Led light emitting diode (semiconductor material) Color depends on semi-conductor, not color of plastic. Mix red, green, and blue to receive white light some led only mix blue and yellow which sometimes appears white. Light is emitted by scintillation (no afterglow) with a yellow phosphor coating on top. Out of light we want a high luminous efficacy. White led used in stadiums bc better uniformity on the playing field. Gan semiconductor led is the source of light yellow phosphor coating on top light is emitted by scintillation (no afterglow) High intensity discharge lamps arc lights flow electricity between the electrodes ionizes light produced from ionized gas. Automotive led headlamp design puts light exactly where you need it. Lasers light amplification by the stimulated emission of radiation. Goggles are the laser police for class four lasers.
