Does Light Disappear? — Photons, Energy, and the Final Question of the Universe
Does Light Disappear? — Photons, Energy, and the Final Question of the Universe Preface — Perhaps the Beginning of All Questions We see light every day. The rising sun in the morning, the starlight in the night sky, the familiar glow under a lamp. But when we peer deeper into the true nature of light — the photon — the universe quickly becomes bewildering. Does light truly exist? Can light disappear? Where does the energy of a shining star eventually go? And how are these questions tied to the ultimate fate of the cosmos? This essay follows that trail — a quiet yet profound journey of thought. Does Light Disappear? 1. Light Is Energy — But Not Matter Light, or more precisely, the photon, is one of the most fundamental elements of the universe we interact with. A photon is both a particle and a wave , and it possesses zero rest mass — it has no mass. But to say it has no mass does not mean it is nothing . Photons: Carry energy, Have momentum, Are affect...