Light particle or wave

If light is a particle, why do we see galaxies after extremely long distances.  Particles would diverge as they traveled farther out.  After really long distances the particles would spread out so much that these galaxies would become invisible.  But this does not seem to be the case.  Light must be a wave.  Experiments where light is seen as a particle must have something else going on.  Such as the light wave interacting with physical matter in a way we don't yet understand.