The amount of scattered light is defined by I = kNV^2/y^4, where k is a proportional constant, N is the number of particles, V is the volume of one particle, and y is the wavelength of the light.
Since the wavelength is in the denominator alone (but to the 4th power), any difference in Tyndal due to the wavelength, will affect all sized particles proportionally the same. I had looked at this some time ago in hopes that by using different colored lasers, one could determine particle size by the difference in the proportion of the intensities of the Tyndal, but alas it just won't work. I wish it would. Marshall Ode Coyote wrote: > Good point. I guess a full spectrum laser would have to be used to detect > proportions of whatever sized particles. > Not too darned easy. > ken > > At 11:05 AM 12/26/01 -0500, you wrote: > >Considering that the tyndall goes up by the 4th power of the size, it > would be > >impossible to measure any ppm unless you knew the size and all the particles > >were the same. > > > >Marshall > > > > -- > 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: > silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com > with the word subscribe or unsubscribe in the SUBJECT line. > > To post, address your message to: silver-list@eskimo.com > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > List maintainer: Mike Devour <mdev...@eskimo.com>
