Re-use of this resource is governed by a Creative Commons
Attribution-
NonCommercial-ShareAlike 4.0 International
https://creativecommons.org/licenses/by-nc-sa/4.0/
When dealing with linear birefringence we can see the following
effects...
S
S
S
When light undergoes circular polarisation it is instead
split into two constantly rotating components.
They are referred to as left-handed circularly polarised light (rotating
clockwise) and right-handed circularly polarised light (rotating anticlockwise).
When circularly polarised light is passed through a chiral
nematic, only one of the two rotating polarisation directions will have
the same 'handedness' as the chiral molecule.
This results in a difference in the liquid crystal's refractive index
for the two components - so one will travel faster than the other.
Once again an optical path difference will be created, and the polarisation
of the light will have rotated upon exiting the sample.