Hi Russ, > According to my understanding of the Tyndall effect, I > infer that this color > indicates that the diameter these particles of CS (+ > impurities) corresponds > to the wavelength of red light, ~700 nm, whereas yellow CS > particles would > be around 580 nm and clear CS would be >/= that of > color-less UV, below 380 > nm..............right??
No. The Tyndall Effect is only manifest when the particle is much smaller than the wavelength of light. For instance, gold colloids look red when the particles are about 13nm in diameter. Regards Ivan. > -----Original Message----- > From: Russ Rosser [mailto:[email protected]] > Sent: Sunday, 14 July 2002 7:32 a.m. > To: [email protected] > Subject: CS>Particle size vs. color > > > Hello, list-- > > A small CS batch turned pale PINK, ostensibly because of container > contamination (perhaps silver agglomerates upon suspended > particles, as > raindrops condense upon airborne dust particles). > > According to my understanding of the Tyndall effect, I > infer that this color > indicates that the diameter these particles of CS (+ > impurities) corresponds > to the wavelength of red light, ~700 nm, whereas yellow CS > particles would > be around 580 nm and clear CS would be >/= that of > color-less UV, below 380 > nm..............right?? > > --Russ > > > > -- > The silver-list is a moderated forum for discussion of > colloidal silver. > > Instructions for unsubscribing may be found at: http://silverlist.org To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]> --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.374 / Virus Database: 209 - Release Date: 9/07/2002 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.377 / Virus Database: 211 - Release Date: 15/07/2002
