Ray Diagrams
Light, Sound and Waves

The ray model

Physics Narrative for 11-14 Supporting Physics Teaching

Building and using the ray model of lighting

Ray diagrams are a predictive model: they are not a representation of beams of light. By following the rules for drawing the diagrams you can predict where light will travel to, and so where there will be shadows, and where will be illuminated.

These ray diagrams are also useful in predicting reflections and refractions (including lenses and prisms). More on these in the next episode.

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