Black Lights

Ultraviolet Light
Grace Dotson and Jenna Tucker

Three Facts about Ultraviolet Light

1. One of the best known health effects of excessive UV radiation is being burned by the sun.

2. UV radiation stimulates vitamin D which the body needs.

3. German physicist Johann Wilhelm Ritter discovered UV rays in 1801.

EM Waves Used in Black Lights

A black light produces UV-A light, as opossed to UV-B light which can be much more dangerous. What you see glowing under a black light are called phosphors. A phosphor converts the energy in the UV radiation from a black light into visible light. A phosphor is any substance that emits visible light in response to some sort of radiation. A phosphor converts the energy in the UV radiation from a black light into visible light.

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