Your Guide to Science Fair Topics, Ideas, Experiments, and Winning Displays
Chameleon Dyes Note: I am revising the following information. I had the opportunity to speak with one of the directors of LCR Hallcrest, a company that makes chameleon dyes. The pencil on the left is covered with Leuco Dye. The pencils in the picture are called chameleon pencils. While chameleons change colors in response to [...]
Question: What causes some objects to glow under a black light? Black lights give off Ultraviolet A light, which is a type of high-energy invisible light (radiation). Photons are packets of light energy. UV light photons have a higher energy than do the photons for visible light. Materials that glow under a black light contain [...]
What is a Black Light? What are Phosphors? “Black Light” seems to be an erroneous name because when a black light is turned on in a dark room, everything is bathed in a beautiful purple color. But what you do not see is the ultraviolet radiation that is being emitted. In black lights, the radiation [...]
ABOUT ME: Hi, I am Janice VanCleave, author of 50 best-selling science experiment books for children ages 4 through high school. I taught science for 27 years.
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