A donut is not a bun. From a mathematical point of view, they are two fundamentally different objects: The donut has a hole, the bun does not. A circle inside the donut around its hole in the center cannot be shrunk to a ...
Optics & Photonics
Feb 28, 2022
0
305
Conventional microscopes produce enlarged images of small structures or objects with the help of light. Nanoparticles, however, are so small that they hardly absorb or scatter light and, hence, remain invisible. Optical resonators ...
Nanophysics
Nov 11, 2021
0
81
Scientists from the University of Granada (UGR) have discovered that oysters are capable of producing three-dimensional structures organized by physical (colloidal) processes—the result of which resembles a solid foam—by ...
Plants & Animals
Nov 18, 2020
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191
Thanks to Einstein, we know that our three-dimensional space is warped and curved. And in curved space, normal ideas of geometry and straight lines break down, creating a chance to explore an unfamiliar landscape governed ...
Quantum Physics
Oct 8, 2020
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3050
How is it possible to walk through 3D virtual realities while staying in one place? Engineers from the Vienna University of Technology have solved this problem and are now introducing their "Virtualizer".
Hi Tech & Innovation
Sep 24, 2013
11
0
(Phys.org) —NASA and Aerojet Rocketdyne of West Palm Beach, Fla., recently finished testing a rocket engine injector made through additive manufacturing, or 3-D printing.
Space Exploration
Jul 12, 2013
0
0
(Phys.org) —3D structures of biological molecules like proteins directly affect the way they behave in our bodies. EPFL scientists have developed a new infrared-UV laser method to more accurately determine the structure ...
Biochemistry
May 13, 2013
0
0
(Phys.org)—Two teams of astronomers have used data from NASA's Chandra X-ray Observatory and other telescopes to map the distribution of dark matter in a galaxy cluster known as Abell 383, which is located about 2.3 billion ...
Astronomy
Feb 28, 2013
53
0
Just as a terrestrial globe cannot be flattened without distorting the distances, it seemed impossible to visualize abstract mathematical objects called flat tori in ordinary three-dimensional space. However, a French team ...
Mathematics
Apr 26, 2012
1
0
(PhysOrg.com) -- Two teams of astronomers have used data from NASA's Chandra X-ray Observatory and other telescopes to map the distribution of dark matter in a galaxy cluster known as Abell 383, which is located about 2.3 ...
Astronomy
Mar 14, 2012
33
0
