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Updated: May 6, 2025
In like manner, the brilliantly-coloured soap-bubbles blown from a common tobacco pipe- -though "trifles light as air" in most eyes suggested to Dr. Young his beautiful theory of "interferences," and led to his discovery relating to the diffraction of light.
The diffraction gratings we planned to use over the lenses of the cameras were the same thing as prisms; they would split up the light from the UFO into its component parts so that we could study it and determine whether it was a meteor, an airplane, or balloon reflecting sunlight, etc. Or we might be able to prove that the photographed UFO was a craft completely foreign to our knowledge.
Proctor regarded it as an effect of diffraction; Stanislas Meunier, of oblique reflection from overlying mist-banks; Flammarion considers it possible that companion-canals might, under special circumstances, be evoked by refraction as a kind of mirage. But none of these speculations are really admissible, when all the facts are taken into account.
For, as Lord Rayleigh and others have shown, the facts responsible for the coming into being of the spectral colours, when these are produced by a diffraction grating, invalidate Newton's idea that the optical apparatus serves to reveal colours which are inherent in the original light.
These radiations are so far apart that it is not astonishing that their properties have not a perfect similitude. Thus phenomena like those of diffraction, which are negligible in the ordinary conditions under which light is observed, may here assume a preponderating importance.
These "diffraction rings" arise from the undulatory nature of light, and their distance apart as well as the diameter of the central disk depend upon the length of the waves of light.
At first they were uniformly unsuccessful, as they were ignorant that allowance must be made for diffraction, and were puzzled at finding that their spears instead of going straight down at the fish they struck at seemed to bend off at an angle at the water's edge.
The brilliantly colored soap-bubbles blown through a common tobacco-pipe though "trifles light as air" in most eyes suggested to Dr. Young his beautiful theory of "interferences," and led to his discovery relating to the diffraction of light.
If the eyepiece is now drawn toward the observer, the star disk begins to expand; and if the mirror be a truly spherical one, the expanded disk will be equally illuminated, except the outer edge, which usually shows two or more light and dark rings, due to diffraction, as already explained.
The cameras would be placed at various locations throughout the United States where UFO's were most frequently seen. We hoped that photos of the UFO's taken through the diffraction gratings would give us some proof one way or the other.
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