ohwilleke's latest activity
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I have just seen a tshirt featuring Schrödinger's Opossum. You don't know if it's alive or dead even after opening the box. -
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ohwilleke reacted to Iskandarani's post in the thread A Physical properties of the vacuum in GR vs. QFT with
Like.
@ohwilleke Thank you for taking the time to put together such a detailed, source-rich reply. That was a lot of work, and it shows. The... -
ohwilleke replied to the thread A Physical properties of the vacuum in GR vs. QFT.For the most part, the problem is that string theory and GUTs and other BSM models simply don't make predictions about parameters at...
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ohwilleke reacted to PeterDonis's post in the thread A Physical properties of the vacuum in GR vs. QFT with Like.
There's another line of research that might be relevant to what the OP was asking about. There was a line of research in, IIRC, the...
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ohwilleke reacted to renormalize's post in the thread A Physical properties of the vacuum in GR vs. QFT with Like.
Yes, gravitational fields in vacuum or a medium can be viewed as inducing effective dielectric properties therein. Here's the abstract...
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ohwilleke replied to the thread B Looking for a list of astronomy collaborations.I added IC, ACT, GRAND, XRISM and CGM.
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ohwilleke reacted to PeterDonis's post in the thread A Is the constancy of c a postulate or a derivable theorem? with Like.
That's how I understand it as well. And the fact that Maxwell's Equations were Lorentz invariant rather than Galilean invariant was...
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ohwilleke reacted to Nugatory's post in the thread A Is the constancy of c a postulate or a derivable theorem? with Like.
And this is why the ether was hypothesized in the first place, and the motivation for the MM experiment which would detect it. At least...
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ohwilleke replied to the thread A Is the constancy of c a postulate or a derivable theorem?.Good to know. I hadn't been aware of that.
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ohwilleke reacted to Sagittarius A-Star's post in the thread A Is the constancy of c a postulate or a derivable theorem? with
Informative.
That's not completely correct. Before Einstein, when the physically relevant coordinate transformation was thought to be the GT... -
ohwilleke reacted to Dale's post in the thread A Is the constancy of c a postulate or a derivable theorem? with Like.
An alternative approach is to just write the most general affine transformation between inertial frames and determine the coefficients...
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ohwilleke replied to the thread A Is the constancy of c a postulate or a derivable theorem?.You can derive the speed of light from Maxwell's equations, and when you do so, you get a result that is independent of the motion of...
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ohwilleke reacted to Sagittarius A-Star's post in the thread A Is the constancy of c a postulate or a derivable theorem? with Like.
Yes. Morin calls it "Relativity without c". Source (see chapter 11.10 on page XI-38)...
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ohwilleke reacted to jedishrfu's post in the thread B Looking for a list of astronomy collaborations with Like.
This is a Wikipedia page of astronomy acronyms listing HESS, DESI, GAIA, but not IceCube, ACT, or GRAND. However, IceCube is also...
