Jun 11 2015

Color-Changing Beads: Fluorescence from UV Light

Category: ScienceAdmin @ 11:27 am

The usual explanation for the behavior of color-changing beads is that they change color when they absorb ultraviolet light. True enough, but why? The name for this process is “fluorescence.” Some pigments absorb light of one wavelength and quickly emit ‐ fluoresce ‐ light of another (or sometimes the same) wavelength. This is similar to […]

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Sep 29 2014

Observation and Preconception

Category: LearningAdmin @ 11:24 am

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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