Re: THE FUNDAMENTAL PROBLEM OF COSMOLOGY

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#6864

From: PD
Date: Thu, 09 Apr 2009 18:14

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On Apr 9, 1:03 am, Pentcho Valev <pva...@yahoo.com> wrote:
> I suspect clever cosmologists now clearly see the importance of the
> following question:
>
> Given the formula:
>
> frequency = (speed of light)/(wavelength)
>
> is the redshift of a distant star's light due to a change in the speed
> of light, or is it due to a change in wavelength?
>

Fortunately, this is easy to check, since a direct measurement of the
wavelength is possible by any number of means.
a) diffraction grating
b) thin film interference
c) oblique cavity resonance
d) double-slit interference

Any of these show that the wavelength has in fact changed.
Multiplying that measured wavelength times the frequency of that
light, also independently measurable, shows that the product is c.

It's so nice when experimental measurement gives you such clean,
unambiguous answers.

PD

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From: PD <TheDraperFamily@gmail.com>
Newsgroups: sci.physics.relativity,sci.physics,fr.sci.physique
Subject: Re: THE FUNDAMENTAL PROBLEM OF COSMOLOGY
Date: Thu, 9 Apr 2009 11:14:54 -0700 (PDT)
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