Light

Attempting to work around the gulfs of absence that are my scientific knowledge...if I propel an object such as a ball in a certain direction the energy imparted will not be sufficient to propel the ball infinitely forward. Instead the ball will rapidly lose velocity and come to a halt. Light on the other hand loses none of its velocity, happily continuing to travel at a constant with no slowing of speed. Just as an odd thought, in the mysterious area of the creation of light and this becoming vision in the mind, what would be the chaotically odd results on our vision if light particles and waves did begin to lose momentum in their travels from source?