Most likely nothing-wrong in Bottle/Contents...LD-is-NOT in Laser-mode? Laser Diodes have a minimum LASING threshold-current...and with weak batteries...you do-not have enough-current to avalanche to LASER mode! Unless you reach minimum-current...any LD will glow-red, not-as-LASER. If not in Laser mode...635 nm Output is OK, but the light is not-coherent. Rather than waiting for (new) battery...just swap-batteries to Test others? Neville...Marshall's describing spectrophotometry not-based-on refraction and while you have a very inquisitive-mind...off-track, get Bad...Answers? In-fact/see-below...learn how to use WIKI/understand PhotoSpectrometry. Here you go...all ready> http://en.wikipedia.org/wiki/Spectrophotometer Dok Dallas P.S. Earlier-posting was accidentally-sent before complete (without) Links and as soon as I can post-again, will POST WIKI-LINKS to get ya going~ Try these-two Search engine's www.dogpile.com & http://en.wikipedia.org (Have hundreds of KEY/WIKI-LINKS...to keep-you-going for many-years?) START~> http://en.wikipedia.org/wiki/Colloidal_particle http://en.wikipedia.org/wiki/Category:Colloidal_chemistry http://en.wikipedia.org/wiki/Rayleigh_scattering Biggest problem...getting good [Scientific] Info...is in-search [wording]..? No-reason, to put-yourself-down, just because lacking a 'degree'...one of IDIOTS I worked with...had Several, yet-failed (creative) Logical Thinkng! Come to think of it...HE DID very well...when DECANTING his Wine.<g> (LoL I'm Sorry ...that must have been the "Ghost-of-Ol' Wayne"...typing) This ONE, will put you at HEAD-of-the-Class, Dogpile [MALVERN DLS]. Chance to show Marshall & Ode how to Size & Zeta 0.6nm Particles~! FYI: View EXCELLENT on-line Educational Seminars, once Registered, strongly suggest...NOT asking-questions here...University Professors..! Better start-here> http://en.wikipedia.org/wiki/Dynamic_light_scattering (MALVERN is world-leader in patented/state-of-art DLS measurements) Neville, rather than get into endless-loop of answering Daily Questions, which take way-too-much TIME from Marshall, or Dok...so~Try LINKS! Prefer to Show member HOW & WHERE-to-SEARCH...not Answering I have even included full physics-package from college...you can study. >From time-to-time can post you KEY-WORDS...to point you, to INFO? http://www.chem1.com/acad/webtext/elchem/ec1.html http://www.chem1.com/acad/webtext/elchem/ec2.html http://www.chem1.com/acad/webtext/elchem/ec3.html http://www.chem1.com/acad/webtext/elchem/ec4.html http://www.chem1.com/acad/webtext/elchem/ec5.html http://www.chem1.com/acad/webtext/elchem/ec6.html http://www.chem1.com/acad/webtext/elchem/ec7.html http://www.chem1.com/acad/webtext/elchem/ec8.html ==================================================
From: Marshall Dudley <[email protected]> Subject: Re: CS>Serious EIS Colour Questions. To: [email protected] Date: Thursday, April 15, 2010, 7:16 AM Try the laser through the bottle with nothing it it, then try it with distilled water in it. We need to find out what substance is blocking it. Marshall Neville Munn wrote: > I think I may have found the answer. I believe the batteries need to be > *REAL* good for the laser to be powerful enough to pass thru a liquid. > Although the laser throws a good spot on the wall it's not powerful enough to > pass thru the solution. The other one which shows lesser beam may be > indicative of batteries in THAT laser starting to go as well. > Will get more batteries and re-check and see how things pan out then. I >would not have thought that a laser beam must have minimum power whereby it >then fails to show thru a glass of liquid though, even though it spots well on >the wall. > N. > > Date: Wed, 14 Apr 2010 12:19:16 -0400 > > From: [email protected] > > To: [email protected] > > Subject: Re: CS>Serious EIS Colour Questions. > > > > Neville Munn wrote: > > > Marshall, would it be possible for you to give me an explanation > > > of why number (3) showed *no* beam thru the solution at all? > > > And for that matter, why there is a difference in strength of beam in > > > the other two? > > > All lasers were used on the same solution.
