🚀 go-pugleaf

On Aug 13, 1:52 pm, Jon Kirwan <j...@infinitefactors.org> wrote:
> On Mon, 13 Aug 2012 15:01:24 -0700, Mark Borgerson
>
>
>
>
>
> <mborger...@comcast.net> wrote:
> >In article <labh28dt456903pr8ktglq1du55em53...@4ax.com>,
> >j...@infinitefactors.org says...
>
> >> On Mon, 13 Aug 2012 04:52:24 -0700, Mark Borgerson
> >> <mborger...@comcast.net> wrote:
>
> >> >In article <34je285htmmfscg6643s4qqlqdfjbch...@4ax.com>,
> >> >j...@infinitefactors.org says...
>
> >> >> On Sat, 11 Aug 2012 23:22:35 -0700, I wrote:
>
> ><<SNIP>>
>
> >> We already use the sun as a source for transmission methods
> >> in a small box. A fluorescent yellow highlighter dipped a few
> >> times into distilled water, kept still transparent clear so
> >> very dilute, produces a beautiful green, for example. It does
> >> require a strong light source to be striking, so that's why
> >> the sun.
>
> >Another good experiment might be to make up a chlorophyll
> >solution---think spinach and rubbing alcohol in a blender,
> >followed by a paper towel filter. (the paper towel filter
> >will also produce quite a nice paper chromatogram under the
> >right circumstances.)
>
> >You will see some nice absorbtion spectra for the
> >chlorophyll and other pigments, you should also see a strong
> >fluorescence peak in the red when looking at right angles
> >to the sunlight.
>
> Yup, I also demontrate chlorophyll. I've been writing to
> scientists about this for such ideas.
>
> I could post up some pictures, I suppose.
>
> Jon- Hide quoted text -
>
> - Show quoted text -

Hi Jon, I was walking around thinking about your calibration
question.

Seems to me you really want some way to change the angle.

So here's my 'cheapest' "picnic plate" spectrometer idea.
You go to the store and buy a package of plastic, or Styrofoam picnic
plates.  You want some with nice indentations (crenulations) on the
edges.  You cut a hole out of the center of one plate, and mount the
grating in the center of the other plate.  Place the 'hole' plate over
the 'grating' plate and duct tape the CCD camera to the hole plate.
Camera pointing at grating.  Count number of crenulations on border to
measure the angle increment.
The whole thing goes in a cardboard box with some sort of
"entrance slit".

There must be some cheap consumer item entrance slit.
How 'bout cheap calipers?  They even come calibrated!

George H.