Refraction phenomena and applications

Learning goals We are learning why total internal reflection occurs. We are learning various applications of refraction and reflection.

Total internal reflection The reflection of all the incident light off the boundary Only when going from more dense to less dense mediums

The critical angle TIR: when the angle of incidence is greater than the critical angle The critical angle is the angle where the light refracts along the boundary

Water demo!!!

TIR Examples

dispersion The refraction of white light into separate colours Different colours of white light travel at different speeds and therefore have a different refractive index (n)

TIR and dispersion

mirages

Reflection and refraction Refraction is usually accompanied by reflection PARTIAL reflection and refraction

Learning goals We are learning why total internal reflection occurs. We are learning various applications of refraction and reflection.

Please complete P531 #1-3, 8,9