title: Parity and optical activity.
abstract: Simple pictorial arguments can demonstrate that the natural and Faraday rotation experiments conserve parity and time-reversal invariance. The method can be used to predict possible new effects without recourse to mathematical theories.
authors.affiliation: Department of Theoretical Chemistry, University Chemical Laboratory, Lensfield Road, Cambridge CB2 1EW.
authors.forename: L D
authors.initials: LD
authors.lastname: Barron