As noted above, the redshift arises from the metric expansion of space; as the space itself expands, the wavelength of a photon traveling through space likewise increases, decreasing its energy.
As space itself expands, the wavelength of a photon traveling through space likewise increases, decreasing its energy. As noted above, the redshift arises from the metric expansion of space.
As noted above, the redshift arises from the metric expansion of space. As space itself expands, the wavelength of a photon traveling through space likewise increases, decreasing its energy.
As noted above, the redshift arises from the metric expansion of space. As space itself expands, the wavelength of a photon traveling through space likewise increases, decreasing its energy.