Date: Fri, 10 Dec 2010 20:12:24

Author: Paul Doherty

Subject: Re: Chlorophyll fluorescence

Post:


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Hi Tom

For even more fun visit a "Health food store" bring your violet laser =
and shine it through the various extracts and oils.

It's amazing fun to spot the fluorescence.

Also at Christmas shine the violet laser at green red and white spots on =
leaves, and into aquarium's with different plants.

Experimental physics is endless fun

Paul D



On Dec 10, 2010, at 7:38 PM, Thomas Senior wrote:

> Thanks Paul,
> The olive oil is cool.
> Also, if you put on you diffraction glasses and look at the blue =
laser spot as it hits different surfaces, you get different spectra, =
(spectrums?) depending on the fluorescent content of the surface. The =
green leaf gives a strong signal in the red as well as some green.
> This is fun!.
>=20
> Tom
>=20
> From: Paul Doherty
> To: tap-l@lists.ncsu.edu
> Sent: Thu, December 9, 2010 1:04:46 PM
> Subject: Re: [tap-l] Chlorophyll fluorescence
>=20
> HI Thomas
>=20
> Shine the green or violet laser through extra virgin olive oil.
>=20
> 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.
>=20
> Paul Doherty
>=20
>=20
>=20
> On Dec 9, 2010, at 10:45 AM, Thomas Senior wrote:
>=20
>> 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.
>>=20
>> Tom
>>=20
>>=20
>>=20
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It's amazing fun to =
spot the fluorescence.Also at Christmas shine =
the violet laser at green red and white spots on leaves, and into =
aquarium's with different plants.Experimental =
physics is endless funPaul =
DOn Dec 10, 2010, =
at 7:38 PM, Thomas Senior wrote: Paul Doherty tap-l@lists.ncsu.edu Thu, December 9, 2010 =
1:04:46 PM Re: [tap-l] Chlorophyll =
fluorescenceHI Thomas=

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