c=Δd/0
so much science happening
[eqn]s = \frac{Δd}{Δt}[/eqn][eqn]s = c[/eqn][eqn]Δt_c = 0[/eqn][eqn]c = \frac{Δd}{0}[/eqn]
if the speed of light depends on the density of the universe,and the universe is expanding, but its mass is not increasing,then the speed of light is not an invariant constant.