Light: Where'd the Mass Go?
If E=mc2, why, would we still conclude light to be massless?
Well, ok, fine: light is massless. And, more precisely, it is not.
The universe itself is the manifestation of infinity from nothing.
Within infinity, particles emerge throughout the entire spectrum thereof, ever larger and ever smaller relative to any given particle.
In the infinite universe, particles of lower energy are subtler and more numerical in quantity, and as their abundance increases they fill "empty space" between larger particles, leading to a resistance for other particles to pass through them.
This gives rise to all resistance in the universe.
As particles become more subtle, this functions like the resolution of a television screen. When particles are large, rare, and spread out, the resolution is low and has very few pixels. As the particles being considered become more subtle--atoms instead of black holes--the pixels bring higher resolution and form a more comprehensible image than individual pixels.
In the vast expanses of space, even atoms are pixelated and disperse, but subtler particles still fill in the pixels between these.
And as we drop down through the range of particles--black holes, stars, planets, atoms, electrons, neutrinos, and reach photons, the resolution continues to increase as their abundance increases.
When we reach the electromagnetic spectrum, at gamma rays we struggle very much to distinguish any wave-like nature, and see particulate behaviors; the image is still pixelated.
Inversely, radio waves are nearly impossible to detect individual particles within and behave almost entirely like waves.
This indicates that, relative to the atoms of which we are composed, there is a transitional region of what we are looking at that begins as seeing individual particles making up the pixels of reality and transitions to only seeing waves, though those waves are collections of particles. This transition is in a region where the pixels are so abundant that we, as observers composed of atoms, see no empty space between the particles. And it occurs seemingly centered on the visible light spectrum.
It is as if the region where our vision lies, which is a function of the atoms of which we are composed, is the highest energy waves that form a complete, unpixelated image of reality. It may even be that this is the reason why we see in the visible light spectrum to begin with: because it is where particles transition to collective wave behavior, relative to atoms.
And the reason? Empty space is not empty. It is so filled with this abundance of photons traveling through our observable universe that they are in an eternal traffic jam with one another, limited to a velocity of c by the baseline energy of our observed cosmos; our observed Zero-Point Energy.
And so, when we measure the mass of a photon, it is not relative to a zero mass baseline but rather is relative to the equilibrium of the environment. For most particles, this is irrelevant in terms of theoretical, experimental, and even real life impact. For photons, it is their mass that we are comparing their mass to.
And so, photons are considered massless as a result, so much so that the upper limit on the mass of the photon has been said to be less than 10-65 g .
This is why our most advanced and careful measurements for the mass of the photon keeps coming up as if there is no mass.
Philosophically, a massless particle in a universe of massive particles is unsound; we are well aware of massive particles. This strongly suggests that light must have mass. Thus, giving credence to our societal capacity to measure the mass of even the most subtle particles, it can be concluded that the mass is hidden because photons are abundant enough that they fill all the empty space of the observed universe to make it behave wave-like out of pixels.
Thus, photons do have mass. It is simply hidden behind the baseline energy which we compare the photons to unknowingly.
It is as if the entire observable universe is within a particle that is composed of photons so densely that it can, then, radiate photons into its cosmos.
And the largest systems are like storms on the surface of the planet, spawning smaller and smaller turbulent flows and vortices therefrom like a hurricane on Saturn:
Thus, photons have a mass; we just have not removed the baseline energy of the environment to which we are comparing the mass of the photon and as a result it has no relative mass difference, producing the true appearance of photons having no mass.
1: B. G. Sidharth Found. Phys. Lett 19(1) 87 (2006)