On the left is your eye and coming into your eye is the light from a
galaxy which is extremely far away and which you see as a dot in the night
sky. If you move your eye slightly upward, you still see the dot of light.
If you move your eye slightly to the right or to the left, you still see
that same dot of light. There would be no place in which you would see the
light and then not see it and then see it again. Also, the light is continuous,
there are no pulses of light-on to light-off back to light-on, etc.. Consequently,
the light from that single source fills all of the space in your vicinity;
and it is doing so contiguously over a distance of millions or billions
of light years all the way from your perception back to the source. Unlike
the schematic which shows the light as "rays" with empty space
between, more properly, it should be considered a solid.
In other words, there really does not seem to be any emptiness. All
of reality, the entire Universe, is a solid with different objects being,
apparently, just different foci of varying degrees of density.
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