🚀 go-pugleaf

On Apr 9, 9:03 am, Pentcho Valev <pva...@yahoo.com> wrote:
> Silly old interpretations of "redshift is due to a change in
> wavelength" can only make clever cosmologists sick at heart:
>
> http://www.amazon.com/Brief-History-Time-Stephen-Hawking/dp/0553380168
> Stephen Hawking, "A Brief History of Time", Chapter 3:
> "In the 1920s, when astronomers began to look at the spectra of stars
> in other galaxies, they found something most peculiar: there were the
> same characteristic sets of missing colors as for stars in our own
> galaxy, but they were all shifted by the same relative amount toward
> the red end of the spectrum. To understand the implications of this,
> we must first understand the Doppler effect. As we have seen, visible
> light consists of fluctuations, or waves, in the electromagnetic
> field. The wavelength (or distance from one wave crest to the next) of
> light is extremely small, ranging from four to seven ten-millionths of
> a meter. The different wavelengths of light are what the human eye
> sees as different colors, with the longest wavelengths appearing at
> the red end of the spectrum and the shortest wavelengths at the blue
> end. Now imagine a source of light at a constant distance from us,
> such as a star, emitting waves of light at a constant wavelength.
> Obviously the wavelength of the waves we receive will be the same as
> the wavelength at which they are emitted (the gravitational field of
> the galaxy will not be large enough to have a significant effect).
> Suppose now that the source starts moving toward us. When the source
> emits the next wave crest it will be nearer to us, so the distance
> between wave crests will be smaller than when the star was stationary.
> This means that the wavelength of the waves we receive is shorter than
> when the star was stationary. Correspondingly, if the source is moving
> away from us, the wavelength of the waves we receive will be longer.
> In the case of light, therefore, means that stars moving away from us
> will have their spectra shifted toward the red end of the spectrum
> (red-shifted) and those moving toward us will have their spectra blue-
> shifted."

Similar idiocies:

http://www.sciam.com/article.cfm?id=does-dark-energy-exist
"Astronomers find, for example, that the light from distant galaxies
is redder than that of nearby galaxies. This phenomenon, known as
redshift, is neatly explained as a stretching of light waves by the
expansion of space."

Pentcho Valev
pvalev@yahoo.com