Hi Neville, Was not 'ignoring' you...simply am not on-line reading through tons-of-email and when/IF I (finally) do get to them...many require (extra) time-to-respond. When/If possible (personal/internet~time), will TRY-to-POST...my answers? This one is fairly-easy...suspecting you have bought CHEAP Lasers! <grin> Laser #3 is obviously NOT~WORKING...if NOT the Battery...Throw-it-Away! Use the RED-LASER giving BRIGHTEST Tyndall...other OK, for CAT~TOY? As for (home-EIS), Getting/Using 'BLUE-RAY' (405 nm) Laser...BAD IDEA..? The one I described using for Tyndall & LIDAR experimenting (last year) was purchased as a (component-only) since it's POWER Class was Illegal-to-sell if delivered WORKING-CONDITION it Will BURN-HOLES & START-FIRES!!!!! Taking time-to-detail LD Experiments...in Retirement/Hobby is Out-of-Scope, but I am always willing-to-help POINT other QUESTERS to KEY Information. How much TIME & EFFORT others-expend in PERSUIT-of-KNOWLEDGE..? Many times...use lengthy (one-on-one) phone calls to discuss more details when LIVE/(interactive) discussion's are the most TIME effective response? Still Provided (E-Eng./science) mentoring to students on Science Projects, but have never had student's as far-away as Australia <G> Down~Under..? Some of your 'questions' are very well-written and do-warrent a reply, But..? Clearly, many members...posting VALID question(s) into Y-Groups & LIST, are lacking scientific-basics/(Physics & Chemistry) to understand...replys? Have personally spent many years before retiremant (in-middle) translating. Strongly recommend using WIKIPEDIA. As you are personally-aware, recent Discussions posted in Beck Y-GrOpE proved-to-be TOTAL...Waste-of-TIME...SALESMAN claimed...95%+ IONIC! Yet members (owning-product) claim going YELLOW...2~3 hour-into Brew. After questioning source of (90~95%) Claims...more BS & How-DARE-you! Had NO-SCIENTIFIC TEST/DATA, only BS%~Estimating...from Professor? (Operates Web-Site providing NO-REAL specifications, only a Sales Pitch) Valuing OUR own-resources...like Marshall, Ode...found SILVER-LIST only ...offered members sending <private> email, to get LINK lere...NO replys... Y-GrOpE has over 2000 members (some already) here...enjoying best IES. Marshall's replys are PRICELESS wealth...Pragmatic/(hands-on) Physics~ but are most-likely understood (in detail) by only a very few members here? My point-being, HOW Fortunate to-be-members in, Mike Devors CS-LIST..! LURKING~ Dok Dallas
--- On Wed, 4/14/10, Neville Munn <[email protected]> wrote: From: Neville Munn <[email protected]> Subject: CS>Serious EIS Colour Questions. To: [email protected] Date: Wednesday, April 14, 2010, 5:10 AM 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. Three different red lasers, > (1) 650nm+/-10 maximum output 1mW.......{strong beam passing thru liquid} > (2) 650nm+/-10 maximum output 5mW.......{fainter beam} > (3) 630-650nm maximum output 1mW.......{no beam at all} N. Australia's #1 job site If It Exists, You'll Find it on SEEK
