Recent content by Yoo
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Graduate Photons vs Neutrinos: Why Do They Behave Differently?
Photons are electromagnetic fields, or rather waves in the electromagnetic fields ...- Yoo
- Post #4
- Forum: High Energy, Nuclear, Particle Physics
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Graduate A strict non-standard inequality .999 < 1
Is 0.999... even anywhere close to what is supposed to be meant by 1 minus an infinitesimal in non-standard analysis?- Yoo
- Post #7
- Forum: Topology and Analysis
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Graduate Is Light in a Perfectly Reflecting Box Redshifted Over Billions of Years?
I understand this, but I wanted something that clearly shows that "expansion of the universe" is not quite "stuff just moving away from each other" without going into the subtleties of distances and speeds over large scales. Unfortunately, it seems my efforts are futile in that anything local... -
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Graduate Is Light in a Perfectly Reflecting Box Redshifted Over Billions of Years?
Great point. Now that I think about it again, another way to look at the problem is to realize that the expansion of space could be modeled as stuff simply moving away for short distances, so keeping the walls of the box still would result in no redshift. So much for my attempt to illustrate... -
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Graduate Is Light in a Perfectly Reflecting Box Redshifted Over Billions of Years?
The size of the box shouldn't matter much (I think), but keeping it the same size would prevent confusion over the redshift being due to Doppler shift as the walls move away from each other. It would highlight how the redshift is due to the expansion of the universe itself rather than because... -
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Graduate Is Light in a Perfectly Reflecting Box Redshifted Over Billions of Years?
If light from billions of years ago were trapped within a perfectly reflecting mirrored box, will it be redshifted in a way comparable to light from galaxies billions of light-years away? I had made up this http://blog.chungyc.org/2009/03/redshift-puzzle/" as a supposed illustration of how the...