Your Guide to Science Fair Topics, Ideas, Experiments, and Winning Displays
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 [...]
Chameleon Dyes One of the pencils is covered with chameleon dye. Can you guess which which pencil is coated with a special dye? The pencils in the picture are called chameleon pencils. Like chameleons lizards, the pencils change colors in response to changes in the temperature. In the diagram, both pencils were coated with ordinary [...]
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.
MORE.....
Connect With Me