Talk:Circular dichroism

message: This article now links from RealD Cinema but some aspects of the technology were better dealt with here than there, because they will be generic to all CD stereoscopy. The actual action of Real D spectacles does not correspond to that of the kind of spiralling waveform described here. Transmitting or blocking of light passed through two filters depends on the direction the light goes through the filters, not just their relative axial orientation, as in conventional polaristion, as if their action is analogous to a rectifying diode on direct current.--Hugh7 (talk) 00:57, 11 June 2012 (UTC)
thread_title: Application to 3D movies

message: Q: Can anyone tell me if CD spectroscopy has been tested on polymers, and not only on biological materials ? thank you.
Guillom 13:59, 4 October 2005 (UTC)
thread_title: Untitled

message: How does the CD spectrometer actually operate?  What are the components that actually generate, process, and detect the light?  It would be great if there was a schematic that explains how measurements are made. M stone 14:37, 2 November 2007 (UTC)
replies: text: I agree. An animation has been added but it doesn't explain much. LostLucidity (talk) 16:38, 12 March 2008 (UTC)
thread_title: CD Spectrometer

message: While some of the article is about circular dichroism, the article summary inaccurately states "Circular dichroism [...] is a form of spectroscopy". No, circular dichroism spectroscopy is a form of spectroscopy, employing circular dichroism. Circular dichroism is an optical effect, in which a material absorbs light of one circular polarization differently from the other. Given that basically the whole article is "applied" (even the more theoretical first section is mostly about samples and experiments and quantities), I'd suggest that someone a bit more knowledgeable on the subject than I might do something like this:
# Move this article to a new Circular dichroism spectroscopy article, excising theoretical stuff and replacing it with links here and to Dichroism.
# Rewrite the existing theoretical/optical content into a new Circular dichroism, probably a stub or start-class article.
# Evaluate merging Circular dichroism into dichroism.
# Evaluate whether Circular dichroism spectroscopy needs to live.
Of course, if there's strong consensus on the third or fourth points, they may override the need to go through with the first or the second.
Andrew Rodland (talk) 21:10, 31 December 2007 (UTC)
thread_title:  Inaccurate summary / article title: move, rewrite, merge? 

message: This article lacks foremost CD-spectra of alpha-helix/beta-sheet/random coil...  —Preceding unsigned comment added by 130.60.169.215 (talk) 14:09, 1 July 2008 (UTC)
thread_title:  Missing Images 

message: Woody is cited in over 30 papers in 1994. Could the reference be a little be more specific as to which paper/journal co-authors it was. 128.243.253.104 (talk) 21:56, 28 April 2011 (UTC)
replies: text: Should be better now (not sure about the page number though). Materialscientist (talk) 04:30, 29 April 2011 (UTC)
thread_title:  Woody Citation 

message: There may be confusion in the article (and maybe also in the field) about the units of CD.
It is stated: "Circular dichroism is the difference Δε ≡ εL- εR", but later it's said: "Then Δε ≡ εL- εR is the molar circular dichroism". So here's no difference between circular dichroism and molar circular dichroism. I guess the first statement should read: "Circular dichroism is the difference ΔA ≡ AL- AR"?  — Preceding unsigned comment added by 130.238.59.124 (talk) 15:50, 29 August 2012 (UTC)
thread_title:  Units of CD 

message: I believe the formula for the theoretical rotational strength should be negative, i.e. Rtheo = -Im ..., alternatively <Ψe|Mmagn.dip.|Ψg> should be used. The magnetic dipole operator is non-hermetian and exchanging wavefunctions leads to a minus.
Ref.: William W. Parson: Modern Optical Spectroscopy, Springer 2007  — Preceding unsigned comment added by 130.238.59.124 (talk) 16:22, 31 August 2012 (UTC)
thread_title:  Sign of rotational strength 

message: According to the article: Symmetry restrictions for natural and induced circular dichroism and optical activity for all point groups, not only Dn and Cn groups show circular dichroism, but also T, O and K groups.  — Preceding unsigned comment added by 94.255.155.158 (talk) 10:02, 31 May 2020 (UTC)
thread_title:  point gruops