Light operates at both macroscopic and microscopic levels, influencing phenomena such as refraction in water and photon absorption by electrons. It serves as a critical link between the microscopic realm, governed by strong and weak nuclear forces, and the macroscopic world, where gravity prevails. The discussion suggests that light, along with the electromagnetic field, cannot be classified strictly as a system. Instead, it functions as a fundamental component that connects different scales of physical interactions. Overall, light's role transcends simple categorization into macroscopic or microscopic systems.