UV Beads Change Color
Clear/pale beads become brightly colored.
Teaching & key ideas
What you do: Move beads from indoor light to UV/sunlight.
What students see: Clear/pale beads become brightly colored.
Why it works: Photochromic molecules change structure under UV light.
Question to ask: What kind of light can we not see but the beads can detect?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: What kind of light can we not see but the beads can detect?