Glow Powder Keeps Glowing
Object continues glowing after light is removed.
Teaching & key ideas
What you do: Charge under light, then darken room.
What students see: Object continues glowing after light is removed.
Why it works: Some excited electrons become trapped and release energy slowly.
Question to ask: Why does this glow last longer than tonic water?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why does this glow last longer than tonic water?