Title

By Grandmaster B

Intro

Did you know there is a special light called ultraviolet light that makes white glow? Also, they donÕt just use black lights in bowling alleys and amusement parks.  If youÕve committed a crime you would know what IÕm talking about. I will tell you about what it is or does, how it works and some history.

What it is or does

Why do black lights make white glow? Tom Harris says, black lights make white glow because of the ultra violet light. Did you know that the ultra violet light is not visible to the human eye?  Also in the spectrum, ultra violent light is next to visible to humans and x-ray.  In other words, if I want my fluorescent poster to ŌglowĶ then I will need a black light.

How it works

Does it use electricity? Yes it uses electricity to work, you plug it in and bam everything glows. The electricity turns it on, and makes the UV rays glow. 

What is it made of? Tom Harris says, black light is made of plastic and glass.  Or, it can be made of woods glass. Woods glass is like what they make glass sculptures out of.  Is that cool, or what.

 History                                                                  

 LetÕs talk about why it was invented. Tom Harris says, the black light was invented so the cops could track down criminals. You see, the black light would make fingerprints visible.  ItÕs because of the organisms on your hands.

Do the police use black light. Tom Harris also says, Yes as I just said they use them to see finger prints. Because you leave organisms in the place you touched, and the organisms glow under black light.

Conclusion

IÕm glad I got picked to do Black lights. It is the best item ever.

 

Credits

 

 

 

 

 

1

Bibliography

Source:

http://www.howstuffworks.com

Author:

Brain, Marshall

Title:

How GPS Receivers Work

Date of retrieval:

7 April, 2007

Brief Summary:

Great article

 

 

2

Bibliography

Source:

http://en.wikipedia.org/wiki/Black_light

Author:

wikipedia inc.

Title:

Black light

Date of retrieval:

25-Apr-07

Brief Summary:

this has 2 picks and has lots of infermation about every thing you need to know about black lights.

 

 

3

Bibliography

Source:

http://science.howstuffworks.com/black-light.htm

Author:

tom harris

Title:

how black lights work

Date of retrieval:

2-may-07

Brief Summary:

this has a lot of information icluding about color and what we can se and can't