Or... a regular flashlight with a cover with a pinhole will do nicely.
I believe this was similar to the original conception.
Chuck
Politics: formed from the Greek "poly", meaning many and "ticks",
meaning small blood-sucking insects
On 12/21/2005 12:13:01 AM, Matthew McCann ([email protected])
wrote:
> There is an alternative to laser pointers for viewing the tyndall effect.
> It is
> the high intensity lead emitting diode flashlight, such as PALights. One
> vendor is http://www.wadwizard.com
> A typical price is about nineteen dollars. Colors available include red,
> white, blue and green. I find white and green to give the most noticeable
> TE. A possible advantage to using several monochromatic PALights
> and/or a polychromatic white PALight is that perhaps an acute observer
> could discern the effect of adding h2o2 to EIS as it changes the average
> diameter of suspended particulates. Eyeball spectroscopy, anyone?
>
> Matthew
>
>
>
>
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