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Jimmy Conway

on 20 April 2010

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Transcript of lol

Double click anywhere & add an idea OPTICS: WHAT IS BLACK LIGHT? AND HOW DOES IT WORK!? A black light is a lamp emitting electromagnetic radiation and emits
very little visible light. Black lights are used in many places. Some of these places include science museums, amusment parks and in Halloween displays. Black light is made visible by phosphors. A phosphor is a substance that emits visible light when it responds to a radiation. The phosphor converts the UV radiation from the black light into visible light. SAFETY PROCEDURES WITH BLACK LIGHT *High exposure of black light and the radiation it emits
can lead to skin cancer. Other effects from exposure of this UVA light include toughening of skin,
weakening of the immune system, DNA damage and the destruction of Vitamin
A in the skin.

You must be sure to not be exposed to black light
for extended periods of time to ensure you are not harmed by the
radiation it produces. MANY USES OF BLACK LIGHT - Black light is used by appraisers and collectors to determine whether a painting is old or not. The phosphors used in paint today is visible under a black light, while older paintings did not contain phosphors. - Law enforcement uses black light to determine whether money is counterfeit or not. Crime scene analysts use black light for forensic studies. They can find finger prints and other fluids.
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