The Difference between the Evans / Morris Effects and Flourescence

These are important remarks by Gareth and it will be very interesting to see how the theory and experiment compare.

Sent: 29/11/2014 20:43:47 GMT Standard Time
Subj: RE: Questions concerning experiments

Sorry, I have been at football with Sion and my phone was out of battery (so I could not pick up e-mail).
Yes, exactly Myron. This is why we have been looking for a frequency shift in glass (there is no absorption so there can be no fluorescence) and why I agreed with you that chlorophyll (in olive oil) is a good material to test the theory with. As can be seen in Rob Fosbury’s spectrum (attached), there is very little absorption (and not a lot of transmission) in the green part of the spectrum (this is why plants are green). So, the shift of the green laser line to the red, for example, is difficult to attribute to fluorescence (where a material has to absorb light, move into an “excited” state, and then re-emit light almost instantaneously of a different frequency). Also, blue, green and red laser light are shifted to exactly the same absorption in olive oil (an absorption of chlorophyll at 680nm). This is remarkable in my opinion (and also answers another question from Horst). It is also important to note that it is the beam of light itself that changes colour. In fluorescence, you usually see the whole body of the material emitting light. In a liquid like olive oil it is difficult to imagine how only the molecules in the path of a beam could become excited and undergo fluorescence. As Myron and I know well from our early research, molecules in a liquid are in a constant state of motion. They are not fixed in a lattice as in solids. If some molecules are excited by incident light you would expect the whole mass of the liquid to fluoresce because of molecular collisions and motions.

If we can reproduce these shifts with your new theory this will be very difficult to argue against. As you say, it doesn’t matter if we describe the shifts in terms of frequency or wavelength. To question shifts of this magnitude is meaningless because you can actually see the colour changes (right across the visible spectrum). Skeptics would have to argue that red and green is blue – and I think we could ignore that!

You are also exactly right on Horst’s second query Myron. As we have emphasised, the colour change actually occurs in the refracted beam inside the material. When the beam re-enters air it reverts to its original incident colour. Theory should also explain this – we now know that it can explain blue shifts. We see the colour changes inside the material in the scattered light that reaches our eyes (and this is where a detector needs to be placed to observe the frequency shifts). I presume this is what Rob Fosbury does in his experiments.

So, to answer Horst, there are three frequency shifts in the spectrum above for olive oil from three different lasers and all are shifted to the chlorophyll absorption at 680nm. Yesterday I circulated details of a spectrum for formaldehyde because in this experiment one exciting laser beam is frequency shifted to a large number of vibrational absorptions. Chlorophyll is a large molecule (I suspect with liquid crystalline properties – because its similar general structure to some liquid crystals we worked on in the past). Formaldehyde though is a very simple molecule (one of the very first to be studied by spectroscopy I believe). So, these two species compliment each other very well. Chlorophyll, of course, is one of the most important molecules in biology.

All the best, Gareth


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