What are photons described as?

Photons are indeed described as bundles of energy. This concept is fundamental to understanding the nature of light and electromagnetic radiation. A photon can be thought of as a discrete packet or quantum of electromagnetic energy, which propagates through space. Each photon carries a specific amount of energy that is directly proportional to its frequency, according to the equation E=hf, where E is energy, h is Planck's constant, and f is the frequency of the photon.

This definition emphasizes the particle-like characteristics of light, as photons exhibit both wave-like and particle-like properties, a concept known as wave-particle duality. While photons are also associated with forms of radiation and can vary in wavelength, it is their role as carriers of energy that fundamentally defines them in the context of physics. Understanding that photons are bundles of energy helps in explaining many phenomena in optics and laser technology, which are crucial in various medical and aesthetic laser applications.