1. Refraction

2. How can we see transparent objects?

3. Reflection & Refraction

4. Refraction

5. The Kingfisher Refraction Air Water
Refraction of light is the bending of light rays at the interface of dissimilar substances
Air
Water

6. The Kingfisher Refraction Air – lower refractive index
When light is passing from a higher refractive substance into a lower refractive substance the light rays bend away from the perpendicular to the surface.
perpendicular
Air – lower refractive index
Water – higher refractive index

7. The Fish Refraction Air – lower refractive index
When light is passing from a lower refractive substance into a higher refractive substance the light rays bend toward the perpendicular to the surface.
perpendicular
Air – lower refractive index
Water – higher refractive index

8. Glass Window Refraction Air – lower refractive index
Light passing through a transparent material exits at the same angle it enters
Air – lower refractive index
Glass – higher refractive index
Air – lower refractive index

9. Refraction
Application
Lens

10. Lenses

11. Refraction
Refraction of light is the bending of light rays at the interface of dissimilar substances
The angle at which the light is bent depends on the Refractive Indices of the two substances
When light is passing from a higher refractive substance into a lower refractive substance the light rays bend away from the perpendicular to the surface.
When light is passing from a lower refractive substance into a higher refractive substance the light rays bend towards the perpendicular to the surface.

13. Refraction Who to - Key Stage 3
Objective – Light behaviour in different transparent materials. Concept of refraction. How it behaves in different materials. Interpretation of everyday experiences.
What they know – Light reflection, opacity, transparency, basic lenses.
Format – 10 min presentation as introduction to subject with class discussions.
Skills – Problem solving, experimental controls, observation, interpretation, application.
What next – Practical investigation with different materials. Calculation of angles of deflection and Refractive Indices