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The author of Skulls in the Stars is a professor of physics, specializing in optical science, at UNC Charlotte. The blog covers topics in physics and optics, the history of science, classic pulp fantasy and horror fiction, and the surprising intersections between these areas. -
Category Archives: Invisibility
Invisibility physics: Kerker’s “invisible bodies”
(This is a continuation of my “history of invisibility physics” series of posts. The earlier posts are: Part I, Part II, Part III, Part IV, Part V, Part VI) The history of invisibility physics truly began with the concept of … Continue reading
Posted in Invisibility, Optics
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Lord Rayleigh’s comments on invisibility (1884)
Found it! I pointed out in my previous invisibility post that R.W. Wood attributes an early discussion of invisibility to Lord Rayleigh in his Encyclopædia Britannica article on optics; however, I couldn’t find the quote after browsing Rayleigh’s articles and … Continue reading
Posted in History of science, Invisibility
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The first paper on invisibility? (1902)
When discussing the history of invisibility physics, I typically cite Ehrenfest’s 1910 paper on radiationless motions as the first publication dedicated to the subject. Ehrenfest’s paper, which attempts to explain how electrons could oscillate in a classical atom without radiating, … Continue reading
Posted in Invisibility, Optics
9 Comments
Invisibility physics: “Reflectionless” objects make an appearance
(This is a continuation of my “history of invisibility physics” series of posts. The earlier posts are: Part I, Part II, Part III.) Up through the late 1940s, it seems that the only type of invisibility that authors were considering … Continue reading
Posted in Invisibility
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Invisibility physics: Hiding and seeking, all at once!
When the first papers on the idea of a “cloaking” device came out in 2006, lots of people were immediately worried that the CIA would soon be peering right over their shoulder from the shelter of invisibility cloaks. Many scientists, … Continue reading
Posted in Invisibility, Optics
2 Comments
Invisibility physics: can charged particles self-oscillate?
Time to return to my long-delayed series of posts on the history of invisibility physics! The first two posts were: Acceleration without radiation (1910), describing Ehrenfest’s arguments suggesting acceleration without radiation could be possible, Schott’s radiationless orbits (1933), describing G.A. … Continue reading
Posted in Invisibility, Physics
5 Comments
Optics basics: Inverse problems
In previous posts, I’ve talked at some length about computed tomography (CT) and optical coherence tomography (OCT). Each of these is a technique for determining information about the internal structure of an object, such as the human body, from exterior … Continue reading
Posted in Invisibility, Optics, Optics basics
6 Comments
New ‘cloaking’ results? Not really, but interesting anyway
About a week ago, I reported on another ‘teaser’ in the media about ‘optical cloaks’, hypothetical devices which would in principle make objects contained in their core completely invisible. Such devices have gotten a lot of attention, both scientifically and … Continue reading
Posted in Invisibility, Optics, Physics
8 Comments
The cloaking craze: A look at the original papers
As I noted a couple of days ago, apparently there has been another significant experimental breakthrough in the development of dielectric cloaking devices. Researchers at UC Berkeley were responsible, though it is a little unclear what exactly the breakthrough is. … Continue reading
Posted in Invisibility, Optics, Physics
15 Comments
Another ‘invisibility cloak’ teaser!
Via several sources (Times Online, via HuffPost and AP, via Pharyngula), I see that there’s another pending high-profile release concerning ‘invisibility cloaks’. Though the physics behind them is accurate, the media is of course pushing rather hyperbolic headlines again: “Science … Continue reading
Posted in Invisibility, Science news
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