Light is among the most complicated of all the mysterious phenomena in nature, so complicated that the deciphering of light will certainly be an "open sesame!" to a more progressive science and technology.

This writing is an expedience for the purpose of violating the wave-energy theory of light by pure mathematics, taking into consideration the opinions I have set forth in the article titled, "Interrelation of Standards and Industrial Development".

Diffraction phenomenon is perhaps the most convincing evidence that light has a wave nature, because it has been explained to some extent by the wave theory of light. The diffraction pattern is formed when light from a distant point source vertically falls on a razor blade or on a circular aperture punched on an opaque plate. The writer believes the diffraction phenomenon (or the separation of light from darkness) could be justified by the photon-particle theory of light. In other words, I want to show that sometimes the cutting edge of reality is stranger than fiction.

The photons or the quantum of energy, as a natural phenomenon with too large population, must have a natural behavior. Therefore, the quanta of energy, like many random variables that occur in nature, behave as though their distribution is normal or approximately normal. Because of this, here we use the Normal, or Gaussian, Distribution Law in the probability theory as our mathematical model in which the random variable is the energy of photon.

The normal distribution is of theoretical importance because it can be used to approximate the distribution of many random phenomena.

The sharp edge of a razor blade, or something like that, is a simulation of large quantity, but finite, of geometrical point sources forming a straight line. Along this line there isn't any distance between the adjoining sources. Consequently, the diffraction phenomenon appears only in the direction perpendicular to the blade's edge, on a screen parallel to the surface of blade.

Let us suppose that the subject of our investigation is the photons of a monochromatic light in the range of  E = Ē ± 3σ diffracted from the edge of a blade, as a linear source, and fall on the screen. We are going to study this random variable (quantum of energy) between Emin and Emax which includes 99.73% of the photons.

E_max - E_min = E_+3σ - E_-3σ = 6σ = T_E = Tolerance of random variable

(E_max + E_min) / 2 = Ē = Mean value (Mathematical Expectation)

σ = Standard Deviation

To prevent any misunderstanding arising from the use of synonyms in different regions of language, it is worthy of mention that here the phrase"Tolerance of random variable" is the same as"Uncertainty of random variable".