Though it has been widely viewed that the light consists of quantum particles known as photons, the light is not made of quantum particles or photons, and the light is always a wave. What is quantized in the light is the frequency. The electromagnetic frequency is always quantized due to the quantized nature of the electromagnetic energy; the quantum energy results in quantum frequency. The light is made up of many discrete electromagnetic wave bursts of constant durations; each burst consists of an electromagnetic wave of a single frequency determined by an integer multiple of the indivisible quantum energy units. The quantum energy and frequency are synonymous; they are one and the same. The duration of a wave burst is a universal constant, and it is the same for all the wave bursts irrespective of the frequency of the electromagnetic wave they contain. Since the quantum energy is in the frequency of the electromagnetic wave in a wave burst, the light can be propagated unlimited distances with the quantum energy intact, without which, the evolution of life would not have occurred. The quantum energy is not affected by any gradual path degradation even after the propagation of light for billions of light years since the quantum energy is the frequency; this would have been an impossible task by any other means such as carrying the quantum energy in a particle or photon on a wave. The light is always a wave, and never a particle; there is no wave-particle duality. There is absolutely no need for an unrealistic, artificial quantum light particle, or photon hypothesis. The hypothetical mass-less particles only exist in human imagination; they do not exist in the nature.