Editing Circular dichroism (section)

===Circular polarization of light===
{{main|Circular polarization}}
[[Electromagnetic radiation]] consists of an electric <math>\boldsymbol E</math> and magnetic <math>\boldsymbol B</math> field that oscillate perpendicular to one another and to the propagating direction,<ref>{{cite book|author1=Alison Rodger|author2=Bengt Nordén|title=Circular dichroism and linear dichroism|url=https://books.google.com/books?id=THeKGC99hJcC|access-date=29 April 2011|year=1997|publisher=Oxford University Press|isbn=978-0-19-855897-2}}</ref> a [[transverse wave]]. While [[Polarization (waves)|linearly polarized]] light occurs when the electric field vector oscillates only in one plane, circularly polarized light occurs when the direction of the electric field vector rotates about its propagation direction while the vector retains constant magnitude. At a single point in space, the circularly polarized-vector will trace out a circle over one period of the wave frequency, hence the name. The two diagrams below show the electric field vectors of linearly and circularly polarized light, at one moment of time, for a range of positions; the plot of the circularly polarized electric vector forms a helix along the direction of propagation <math>\boldsymbol k</math>. For left circularly polarized light (LCP) with propagation towards the observer, the electric vector rotates [[clockwise|counterclockwise]].<ref name="E. I. Solomon and A. B. P. Lever 2006 78"/> For right circularly polarized light (RCP), the electric vector rotates clockwise.

[[File:Linearly pol.png]]     [[File:Circularly pol.png]]