Critical Angle, Total Internal Reflection

Sunday, 7 October 2018

9:16 PM

 

The critical angle is the angle of incidence which results in an angle of refraction of 90 degrees

 

Total Internal Reflection

For angles of incidence greater than the critical angle, the beam is entirely reflected.

When light is directed from a medium to another medium with an even lower index of refraction.

 

An example of this is optical fibre cables