6A46.16 Rainbow Dust (Glassbow)
Concepts
Dispersion of light, refraction, reflection
Overview
A light is shone onto a board with many small glass beads attached. Reflection, refraction and dispersion of light in the beads results in the appearance of a "rainbow."
Details
Equipment
- [1] Desk lamp
- [1] Board with beads
Classroom Assembly
- Place the lamp on the table.
- Lean the board against the wall in front of the lamp.
Script
- Turn off the room lights.
- Turn on the lamp. Adjust the position of the lamp as necessary.
Additional Resources
References
- PIRA 6A46.16
Disclaimer
- Don't attempt this at home!
Last revised
- 2026
Technicals
- Original construction: glass sandblasting beads were glued with spray adhesive to a foam-backed cardboard poster board.
Related AV
Related demos
If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.