[ngc6656]

Bump!

The speed of light and the color of light are related. If the speed of light has increased, would the old light from galaxies long ago and far away appear to be redshifted?

A darned good question that I hope someone with a good understanding of the physics of light will answer for us.

[VadeRetro]

The speed of light and the color of light are related. If the speed of light has increased, would the old light from galaxies long ago and far away appear to be redshifted?

As best I can figure, the speeding of light in "recent" times (i.e, post-emission along the way) would BLUE-shift the light as we see it here and now compared to how it would have looked to someone near the emitting object back when.

[GrandEagle]

The speed of light and the color of light are related.
I know I'm opening myself up here, but IF I remember my physics correctly the color's visible have to do with the frequency, of oscillation, not the speed of travel.
Be easy on me, I've not been through this stuff in quite a while AND my memory is pretty full. Consequently, when I have something new to store in memory, I have to find something old and unused to throw out. I could have thrown this information out.

[mdmathis6]

Shorter visible wave lengths of light have less amplitude than longer wavelengths of light...longer wavelengths "carry farther". Light from more distant galaxies has longer to get here and it travels thru regions of varying densities of gas and dust. It stands to reason that more distant points of light would appear redder as the shorter wavelengths would be absorbed by distance and variable matter densities in the voids of space. I suspect that after a certain distance, the ability to guage a star or galaxy's speed or direction relative to our own by means of red or blue shift must become indetirminate related to distance and particulate density. It takes more energy to produce higher wavelengths(at a lower frequency) at a given luminance than it does lower wavelengths(at a higher frequency). Somebody out there want to blow holes in my blather...go for it, I await instruction!