Total Internal Reflection

Total Internal Reflection

1. When light leaves a material with a high refractive index, to an area with a lower refractive index the light speeds up, bending away form the normal.

   • So if you increase the angle of incidence, the angle of refraction gets closer to 90 degrees
     • When the angle of incidence reaches the critical agle, the angle of refraction is 90 degrees
       • When you go past the critical anbgle you get total internal reflection, where no light leaves the medium
   • Such as Glass to Air