Quick Answer: The Light Guide Demonstrator is a 220 mm acrylic bar formed into a shallow 'S' shape that shows how total internal reflection can confine light within a guide or fibre.
Last updated: October 2026
Key Features
Acrylic bar, 220 mm x 20 mm x 20 mm
Formed into a shallow 'S' shape
A ray from a light box or laser reflects several times inside the bar
Lower surface painted white to aid visibility of the ray path
Also available as a pair with the LED.white
Technical Specifications
Specification
Value
Material
Acrylic
Dimensions
220mm x 20mm x 20mm
Shape
Shallow 'S'
About This Product
The 'S' shape prevents the direct passage of a light ray, so a ray introduced at one end is seen reflecting several times from the internal surfaces before it emerges from the other end. This leads to an appreciation of the principles of optical communications. The Light Guide Demonstrator is available for supply within India and for export to Belize, Antigua and Barbuda, Iran, Syria, Niger and United States.
Frequently Asked Questions
Q1. What light source can be used? A light ray from a light box or a laser can be introduced into one end of the bar.
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