This work presents a conceptual model that reinterprets the cosmic redshift, traditionally considered evidence of spatial expansion in standard cosmology, as a process of light diffusion. By considering changes in the energy distribution of photons during long-distance propagation, the elongation of wavelengths (redshift) can be explained without invoking the expansion of space itself. The model does not aim to replace existing theories, but rather offers an alternative framework to understand observational data. It highlights the conceptual freedom in interpreting redshift and proposes that cosmic phenomena may be viewed through the properties of light, opening potential new perspectives in cosmology.
Akihito Sugawara (Wed,) studied this question.