Q. What are the conditions for total internal reflection ?
:- The following conditions should be fulfilled for total internal reflection to take place at the fibre walls :
1. The core must have a slightly higher refractive index than the cladding.
2. Light must have an angle of incidence greater than the critical angle.
The light so reflected bounces off the walls after repeated total internal reflections and proceeds in a zig-zag path.
:- The following conditions should be fulfilled for total internal reflection to take place at the fibre walls :
1. The core must have a slightly higher refractive index than the cladding.
2. Light must have an angle of incidence greater than the critical angle.
The light so reflected bounces off the walls after repeated total internal reflections and proceeds in a zig-zag path.
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