Light Quantization

Here is one  way to look at the quantization of light in a laymen's manner -- so that it is simpler to understand.  Let us say alogorically that the smallest amount of water -- in this arbitrary example -- was a small drop of water.  When one given said drop of such water drops into a pool of water, what was initially a drop of water will here now, in a way, act as the whole pool of water in this case-- yet, the said drop of water will still act as the initial drop of water in other ways as well.  The said pool, in this case, may be thought of as a conglomeration of basically countless of such drops of water.  This may work to help explain the concept of quantization in a metaphorical manner that a layman can understand.
Likewise, when a photon quantizes into a beam of light, the said photon then acts as both the whole beam of light -- as well as acting as the individual said photon at the same time.  Here as well, the photon is the smallest amount of electromagnetic energy (here, light in this case) that still acts as the phenomenon of being electromagnetic energy.  A discrete amount of electromagnetic energy is the smallest amount of electromagnetic energy that is still electromagnetic energy.  We normally think of light when we think of electromagnetic energy. A discrete unit of electromagnetic energy is also known of as a quantum of light.  The just mentioned condition of a photon entering a beam in such a manner in so as to both act as the whole given arbitrary beam of electromagnetic energy -- as well as acting as an individual photon -- is the basic general concept as to what the quantization of electromagnetic energy is.  And, all motion is relative to the existence and the activity of electromagnetic energy -- or, to simplify, all motion is relative to the existence and the activity of light.