👉 Light, often perceived as a form of electromagnetic radiation, is fundamentally composed of particles known as photons. These light particles are massless and travel at the speed of light in a vacuum, exhibiting both wave-like and particle-like properties—a concept central to quantum mechanics. Photons are the quanta of light energy, meaning they carry discrete packets of energy proportional to their frequency, as described by Planck's equation (E = hν). Despite their seemingly intangible nature, photons interact with matter in various ways, such as through absorption, emission, and scattering, which underpin phenomena like photosynthesis, the operation of solar cells, and the functioning of optical devices. The concept of light particles bridges classical physics and quantum theory, illustrating how the behavior of light can be understood at both macroscopic and microscopic scales.
