Question

Why does light fade away after some distance?​

Answer 1

Answer:

As light travels away from a galaxy, the Universe is continually expanding, meaning that the distance the light needs to travel is continually increasing as well. As space stretches out underneath a beam of light, its wavelength increases, and its energy decreases.

Answer 2

Answer:

Hey there

Nice Question

Here's your answer

Over very long distances, the photons sort-of fade out due to cosmological redshifting. Basically their wavelength gets longer and longer until they cannot be detected by our instruments: they have so little energy left that they are not distinguishable from vacuum fluctuations.

Hope this helped you. ♥