A Thesis Submitted to
In Partial Fulfillment of the Course
Requirements in Science IV
February 16, 2011
Black Light is also referred to as a UV light. A lamp that emits electromagnetic radiation almost exclusively in the soft near ultraviolet range that is only partially visible. Black Light as used to detect money helps us protect from fraud and for our security and theft prevention. This thesis contains everything about Black Light that detects fake money. How to use them, how its made, who invented it, when was it first released and the different types, features, its history, and its effects. It state the problem, procedure, results and conclusions about Black Light Money Detector.
Perhaps the most useful type of fluorescent lamps in terms of its application to medicine is the UV light bulbs or ultraviolet light bulbs. In medicine, UV light is effectively used in phototherapy or light therapy. Patients are exposed to the UV light in a period of time depending on the close necessary. For treatment, it is used primarily in treating skin problems such as acne vulgaris.
Portable, affordable counterfeit and fraud detection is here. This state-of-the-art system is ideal for retailers, banks, and restaurants anywhere cash is handled. High-powered ultraviolet LEDs pick up even difficult-to-detect UV markings on documents and currency. Powerful white LED reveals watermarks on paper currency. By simply placing the document in question in to the slot and turning on the UV light you be able to identify the ultraviolet security features instantly.
You have probably seen black lights at amusement parks, science museums and Halloween displays. Black lights may look just like normal fluorescent lamps or incandescent light bulbs, but they do something completely different. Switch one on, and white clothes, teeth and various other things glow in the dark. For example, if you have a fluorescent poster and shine a black light on it in a dark room, the poster will glow brightly. You may have also seen pieces of paper that look blank in regular light but spell out a glowing message under a black light. Many amusement parks use hand stamps that are invisible until you view them under black light. In this article, we'll find out exactly what's going on here. We'll also see why black lights make some objects glow but not others, and we'll look at some interesting black light applications.
REVIEW OF RELATED LITERATURE
The black light that humans can perceive is actually purple light at the near edge of the ultraviolet range, which humans cannot perceive, but plants can use for photosynthesis. Black light bulbs were developed in 1935 by William H. Byler, using a glass invented by Robert Williams Wood in 1903.
The term backlight first appeared in print in 1896, used by the French sociologists Gustave Le Bon for his newly discovered invisible light. Le Bon described how a black light from an oil lamp flame passed through a steel-plated box and completely exposed a photographic plate inside. In Philosophical Magazine, Le Bon wrote that opacity only exists for human eyes, and not for light, and that if the human eye were somewhat differently constructed, we could see through walls. As it turns out, he was wrong.
In 1903, Robert Williams Wood, a physics professor at Johns Hopkins University in Baltimore, developed a glass filter that blocks visible light, but allows ultraviolet light to pass...