In a message dated 3/27/01 8:58:29 AM EST, [email protected] writes: << For very small particles, the absorbed light is way below UV and the complement is also way below UV, so no coloration is apparent. Since a high concentration of particles will absorb light to some extent across the entire visible spectrum without causing coloration, the solution then appears as a white milky solution. If anyone is really interested I will take a photo of such a solution and post it on my web site. I routinely make 5 to 10 ppm all particles in the 10-30 nm range. These all appear white and milky. frank key >>
Frank: Thanks for your reply. Sorry to so persistent, but could you elaborate more about the physical phenomenon that allows SOME light "across the entire visible spectrum" to be adsorbed? And it there any difference in appearance between large and small particles when both fall outside the visible range so that both appear colorless? Roger -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
