Physics Dept. Demonstration Manual

DOP 06 - Light Pipe


To illustrate total internal reflection of light.

  • Laser (hand held laser diode)
  • 3 Light pipes
  • Stand, clamp


This arrangement is analogous to the transmission of light by fibre optics. Light projected from the neon laser at one end is emitted at the other. The internal light reflections are visible inside the rod.