11. The term " optical activity " is derived from the interaction of chiral materials with polarized light. 12. Here he continued research on metal coordination compounds and began his important work on optical activity of metal complexes. 13. There, he invented fluorescence detected circular dichroism for measuring the optical activity of the fluorescent component of a solution. 14. In electromagnetism, spatial dispersion plays a role in a few material effects such as optical activity and doppler broadening. 15. The non-isotropic permittivity for nonzero wavevector leads to effects such as optical activity in solutions of chiral molecules. 16. In order to display optical activity , a fluid must contain only one, or a preponderance of one, stereoisomer. 17. In the presence of an applied magnetic field, it is possible for samples of all compounds to exhibit optical activity . 18. The absence of optical activity is due to a mirror plane in the molecule, [ segmented line in picture below] 19. With three carbon atoms, dihydroxyacetone is the simplest of all ketoses and is the only one having no optical activity . 20. At the fundamental level, optical activity is a case of circular birefringence, and can best be understood in that way.
