playing along the chord of the doppelganger effect in the light frequency, is it possible to send reverberations of light as a form of communication...

Over an X amounted distance

Do you mean like sending digital or analog signal via a laser type transmitter. If so thats very possible, in fact to some extent we use it already, dont know if this is what your talking about though, sorry.

I'm with nastradamnus. If you could explain what you call the "doppelganger effect" some it would help.

Does the doppleganger effect have to do with how twins can perceive eachother's thoughts, or how 2 atoms sent infinitely in opposite directions (supposedly) know of eachothers quantum state?

I'm not so shure wether I'm meaning the same thing as you are but if I am, I will try to explain it:

Single photons emitted by a photon source are directed on a semiconducting mirror. This mirror usually only reflects one half of a ray while the other half can pass through. Single protons are reflected or allowed to pass with the same probability. At the end of each path is a detector. Each time a photon is emitted it's position of the impact is noticed and recored on either detector A or detector B. If the coordinates of the impactpoints are drawn on a paper a iterference pattern develops characteristic for waves. It seems that the photon has been split and traveled both path A and B. To find out which path the photon took we try to taint it. If two pices of polaroid with matching planes of vibrations are placed in path A and B the pattern remains but it lasts longer since half of the photons are absorbed. The polaroid at path B is turned by 90'. This allows us to decide which path the photon took by meauring its polarisation. This time the pattern doesn't show up. How does the photons know in which way the polaroid at the opposite path is placed? The split photons don't interact with each other anymore since one of them is absorbed. From the first experiment we saw that a particle doesn't have to be either at A or B it can be at both places although only on one detector an impact is measured. This can be explained that the photon is split up until the measurement which has a big influence on the system in QM.

Probably I mixed up some things but this is accepted sience. This may have nothing to do with the doppelg�nger effect but I could imagine transmitting information this way. That would be a very efficient method since information could be extremely densly packed.
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