Soumendra Nath Thakur
0000-0003-1871-7803
11-05-2024
The Doppler redshift applies everywhere, it applies to spatial distance as a result of motion.
In the absence of gravitational effects (absence of inertial mass) photons have no gravitational redshift, also known as Einstein's redshift, especially in intergalactic space where dark energy influences the effect.
The redshift of photons in the absence of gravitational effects is called the cosmic redshift or Hubble redshift, especially in intergalactic space where the influence of dark energy dominates.
