👉 Light particles, or photons, are fundamental entities that exhibit both wave-like and particle-like properties, a concept central to quantum mechanics. These tiny packets of energy travel through space at an incredibly fast pace, typically at the speed of light, approximately 299,792 kilometers per second in a vacuum. Photons are responsible for various phenomena, from the colors we see in the rainbow to the energy that powers stars and drives photosynthesis in plants. Despite their minuscule size—often described as being about 400 times smaller than a proton—they carry significant energy and momentum, making them crucial in fields ranging from optics and photonics to quantum computing and astrophysics. Understanding light particles is essential for grasping how the universe interacts at both microscopic and cosmic scales.