The usual explanation for the behavior of color-changing beads is that they change color when they absorb ultraviolet light. True enough, but why? [easyazon_image align=”left” height=”109″ identifier=”B004LCQRV4″ locale=”US” src=”https://sparkamind.com/wp-content/uploads/41eQ7TW0XmL.SL1101.jpg” tag=”spaaplamin00-20″ width=”110″] [easyazon_link identifier=”B004LCQRV4″ locale=”US” tag=”spaaplamin00-20″](Affiliate link to product at Amazon)[/easyazon_link] The name for this process is “fluorescence.” Some pigments absorb light of one wavelength and […]
Jun 11 2015
Color-Changing Beads: Fluorescence from UV Light
Comments Off on Color-Changing Beads: Fluorescence from UV Light
Aug 04 2012
New Discoveries in Oobleck Science
If you have not ever seen anyone jog on a mixture of corn starch and water – “oobleck” – check out the video from the Spanish TV show, "El Hormiguero," included in Wired Magazine’s July 11, 2012 online article, "Defying Gravity: When Strange Liquids Act Like Solids." Water and cornstarch combine to form what in […]
Comments Off on New Discoveries in Oobleck Science
Apr 09 2012
Family Life Expo & Camp Fair
This is the first in what will be a series of articles about science and math education for children, activities, learning philosophy and psychology, and a few summaries and comments about interesting education-related stories from other sources. My assistant Stan Jackson and I enjoyed the March 2012 Family Life Expo & Camp Fair, our first […]
Comments Off on Family Life Expo & Camp Fair