Light Trapped in an Acrylic Rod
Light stays inside and exits at far end.
Teaching & key ideas
What you do: Shine light into one end and bend/angle rod.
What students see: Light stays inside and exits at far end.
Why it works: At suitable angles, light repeatedly reflects inside instead of escaping.
Question to ask: Why doesn't light leak out at every surface?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: Why doesn't light leak out at every surface?