👉 Light, at its core, is composed of particles known as photons, which are fundamental units of electromagnetic radiation. These particles are incredibly small, far smaller than any atom or molecule, and they exhibit both wave-like and particle-like properties—a phenomenon known as wave-particle duality. Photons are massless, meaning they have no inertia, and they travel at the speed of light in a vacuum, approximately 299,792 kilometers per second. Despite their minuscule size, photons carry a significant amount of energy, which is why they can cause phenomena like photoelectric effects and enable light to penetrate various materials. Understanding light as composed of these particles is crucial for explaining optical phenomena, from the behavior of lenses and prisms to the functioning of solar cells and the intricate processes in photosynthesis.
