Light cannot be created or destroyed in the sense that its energy cannot be completely eliminated or brought into existence from nothing. According to the law of conservation of energy, energy can only be transformed from one form to another. In the case of light, it can be generated by various processes, such as the emission of photons from excited atoms or the acceleration of charged particles. Similarly, light can be absorbed or scattered, which changes its direction or form, but does not destroy its energy.
However, it's important to note that the universe is not a closed system, and its energy is not conserved in the traditional sense. Due to the expansion of the universe, the light from distant sources, such as galaxies, is redshifted as space stretches, which effectively reduces the energy of individual photons. This means that light is stretched to longer wavelengths, ultimately leading to a loss of energy.
If light were to be completely annihilated or created, it would have significant implications for our understanding of the laws of physics and the nature of the universe. The conservation of energy is a fundamental principle, and any violation of it would require a reevaluation of our current scientific framework. Additionally, light plays a crucial role in various processes and interactions throughout the universe, so its absence or sudden appearance would likely have far-reaching consequences, affecting everything from the behavior of matter to the propagation of electromagnetic waves.