Date: Thu, 9 Dec 2010 11:04:46 -

Author: Paul Doherty

Subject: Re: Chlorophyll fluorescence


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HI Thomas

Shine the green or violet laser through extra virgin olive oil.

The chlorophyll fluoresces red.
It's cool to look at the color change with the viewing angle using the =
green laser, in the forward direction the green scattering plus the red =
fluorescence is seen as yellow. To the side there is less scattering and =
more fluoresecnce so the beam appears red.

Paul Doherty

On Dec 9, 2010, at 10:45 AM, Thomas Senior wrote:

> I was experimenting on my cat last night, CAREFULLY using red, green, =
and blue laser pointers to try to determine which she preferred. The =
results were inconclusive, as she desperately wanted to attack any =
color. Anyway, when the blue laser hit a green leaf of a house plant, =
i noticed the dot turned RED. It was pretty cool. Perhaps some of you =
would verify the observation. There is a demo where you grind up =
spinach and make a green solution of chlorophyll and a bright white =
light will fluoresce as it passes through. This blue laser on a green =
leaf may be easier.
> Tom

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