On 6 Apr 2007 09:04:59 -0700, "K7ITM" wrote:
Seems to me you're way off point here, Richard.

Hi Tom,

Hardly an unfamiliar comment.

I'm in my lab, my
inertial frame of reference. I send some EM waves through my vacuum
chamber and I measure their speed as 2.997...*10^8 meters/second. The
same waves continue on through the glass of the bell jar keeping air
out of my vacuum, and I happen to notice that their speed through that
glass is1.684*10^8 meters/second. I notice that light from my
hydrogen light source contains certain well-defined spectral lines,
but each of those passes through my vacuum at the same speed.

Same as what?

However, I notice that those lines, in a short pulse of light, come
out of the glass separated in time slightly, implying that they took
different times to get through the glass, and were therefore not even
travelling through the glass at the same velocity; I notice no such
separation for the light passing through the vacuum.

Same as what? Different wavelengths respond to different inertial
frames of reference, a prism demonstrates this quite dramatically.
This happens quite commonly for wideband transmissions through fiber
optics. The solution has been to send them as Soliton waves. Another
solution is to employ micro channels.

Further, I
notice that light from a distant star has apparently the same set of
spectral lines, but they are shifted to slightly longer wavelengths.

A typical frame of reference example.

However, they take the same time to pass through the vacuum as my
locally-generated hydrogen light.
All my measurements are in the same
frame of reference, and IN VACUUM the speed of em radiation appears
from all my measurements to be the same, no matter its wavelength,
even for very long wavelengths, but in other media, still the same
inertial reference frame, it's different. I also happen to notice
that the light from the distant star was created in a different
inertial frame of reference...

There are a lot of "same"s here and some are being shown to be
different, and others same. I'm wondering what the point is that I'm
way off from.

73's
Richard Clark, KB7QHC