Gamma-Ray Bending Opens New Door For Optics 65
sciencehabit writes "Lenses are a part of everyday life—they help us focus on words on a page, the light from stars, and the tiniest details of microorganisms. But making a lens for highly energetic light known as gamma rays had been thought impossible. Now, physicists have created such a lens, and they believe it will open up a new field of gamma-ray optics for medical imaging, detecting illicit nuclear material, and getting rid of nuclear waste."
Not impressive yet (Score:5, Insightful)
Re:Fogbank? (Score:4, Insightful)
when you think to yourself "I know, I'll mention something obscure that people will need to look up on Wikipedia to know wtf I'm talking about!", you might want to double-check that Wikipedia doesn't contradict your claim.
Re:n = 1.000000001 (Score:5, Insightful)
Agree. Even if you do it with depleted uranium, and you suppose the "virtual electron effect" increases in proportional to the square of the number of protons in the nucleus, you might get an index of refraction in the ballpark of n = 1.000000033. Applying the lensmaker's formula [mtsu.edu], a convex lens with radii of curvature of 1 cm will have a focal length of ....
150 kilometers.
So the gamma ray imaging camera you want to build for airport security will have to be roughly the same size as your flight. No, not the length of the plane, the mileage.
shhhh... (Score:5, Insightful)
Re:n = 1.000000001 (Score:4, Insightful)
I think that a lot of these same principles are involved in building x-ray lenses -- the lens is less like a glass lens, more like building an interferometric scattering array that causes a single central primary peak. But not my specialty, just thinking out loud...
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