[Gary Boldwater]

How is the expansion of the universe measured? Not by measuring distance. It's measured by the spectral shifts of known emitters of light. One cause of the shift could be the relative velocity of the source to the observer. This would explain the expansion. However, if the velocity of light slowed with time, the results would be the same. Now, look at the historical record of the velocity of light measurements over the few hundred years it's been done. It's slowing down.
It's too bad most scientists run with the herd. We need a few strays who think for themselves to advance knowledge.

[FreeReign]

How is the expansion of the universe measured? Not by measuring distance. It's measured by the spectral shifts of known emitters of light. One cause of the shift could be the relative velocity of the source to the observer. This would explain the expansion. However, if the velocity of light slowed with time, the results would be the same. Now, look at the historical record of the velocity of light measurements over the few hundred years it's been done. It's slowing down. It's too bad most scientists run with the herd. We need a few strays who think for themselves to advance knowledge.

Well said!

[William Tell]

Gary Boldwater said: "Now, look at the historical record of the velocity of light measurements over the few hundred years it's been done. It's slowing down. "

I've read that red-shift might be explainable by a reduction in the speed of light over the life of the universe. I have not read that earth-based measurements support this possibility.

Can you recommend a summary of this evidence? Thanks.

[PatrickHenry]

However, if the velocity of light slowed with time, the results would be the same.

The redshift is not a feature of the speed of light, but of the recession of the source of the light. So yes, you're correct up to this point.

Now, look at the historical record of the velocity of light measurements over the few hundred years it's been done. It's slowing down.

Do you have a reliable source for this?

[TN4Liberty]

Now, look at the historical record of the velocity of light measurements over the few hundred years it's been done. It's slowing down.

Calculations for the speed of light over the years have been done in different ways. If the same methods were employed over the years and the results showed a decrease, you might be able to make this argument. Not saying it isn't true, but I haven't seen the data to support it.

Still, if we accept your premise as true that light is slowing down, don't we then have to explain how that is happening? The concept of light slowing down throughout the universe is no easier for me to explain than the idea that the expansion of the universe is accellerating.