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
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Sep 29 2014
Observation and Preconception
Humans are self-correcting organisms. It is sometimes amazing how long it takes us, but once we recognize a problem or a mistake, solutions often come quickly. As a teacher, I try to give children time and space to correct themselves whenever possible. They are happier when they figure it out themselves. But sometimes I need […]
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