Fibre optics Flashcards
1
Q
Critical angle
A
The least angle of incidence.
2
Q
Optical fibre
A
Glass wire that carries information on the form of light.
3
Q
Signal
A
Light transmitting information in its amplitude and frequency.
4
Q
Refraction
A
Light changing direction and speed as it enters a new medium.
5
Q
Reflection
A
Light bouncing back from a boundary.
6
Q
Why are optical fibre better than copper wire?
A
They have lower losses, more security and a greater bandwidth but are more expensive.
7
Q
Equation for refractive index
A
sin (incidence) / sin (refraction)
8
Q
Total internal reflection
A
Where all of the light reflects back into the medium instead of travelling through air.
9
Q
Equation for critical angle of a medium
A
1 / n
