Refraction
How can we see transparent objects?
Reflection & Refraction
Refraction
The Kingfisher Refraction Air Water Refraction of light is the bending of light rays at the interface of dissimilar substances Air Water
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
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
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
Refraction Application Lens
Lenses
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.
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