Physical Implications of Assuming a Tiny Mass for Light

This study explores the physical implications of assuming a tiny, nonzero rest mass for light (photons). While photons are conventionally treated as massless, this work considers the possibility that free light possesses an extremely small intrinsic mass. The paper discusses how this assumption affects the understanding of mass conservation, the generation of matter from light, the behavior of bound light in resonators or gravitational fields, and the total mass evaluation of the universe. By adopting this perspective, the study provides a unified conceptual framework that complements existing experimental constraints on photon mass and offers new insights into fundamental physics and cosmology.