Results 221 to 230 of about 3,723 (266)

A deterministic platform for engineering interfacial phenomena in porous media using artificially structured rough surfaces. [PDF]

Sci Rep
Golshokooh S, Simjoo M, Chahardowli M.
europepmc   +1 more source

Non-elastic membrane dual-actuation liquid lens for continuous focus and zoom. [PDF]

Microsyst Nanoeng
Zhang J, Zhang WX, Shen H, Lu Y, Jin YX, Liu YZ, Chen GY, Wu H, Xue LW, Sun LN, Chen LG.   +10 more
europepmc   +1 more source

Minimum Spacetime Length and the Thermodynamics of Spacetime. [PDF]

Entropy (Basel)
Rossi V, Cacciatori SL, Pesci A.
europepmc   +1 more source

Black hole information turbulence and the Hubble tension. [PDF]

Sci Rep
Cabrera Fernández JL.
europepmc   +1 more source

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Gravitational Lens Optics

Science, 1989
Several instances of multiple imaging of cosmologically distant sources by intervening galaxies and galaxy clusters have been discovered over the past decade. These "gravitational lenses" have distinctive optical properties. Pointlike sources such as quasars generally produce two or four images when lensed, whereas extended sources such as galaxies ...
Blandford, R. D., Kochanek, C. S., Kovner, Israel, Narayan, Ramesh   +3 more
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GRAVITATIONAL LENS AMPLIFICATION OF GRAVITATIONAL RADIATION

International Journal of Modern Physics D, 2002
In a recent paper by Wang, Turner and Stebbins (1996) an influence of gravitational lensing on increasing an estimated rate of gravitational radiation sources was considered. We show that the authors used the geometrical optics approximation model for gravitational lensing and thus they gave overestimated rate of possible events for possible sources ...
ALEXANDER F. ZAKHAROV, YURI V. BARYSHEV
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GRAVITATIONAL LENS

1996
exaly   +2 more sources

Gravitational lens

American Journal of Physics, 1981
A plastic lens is described which will bend light rays parallel to the lens axis in the same way as a static (Schwarzschild) gravitational field. This allows one to observe the optical distortions caused by a (nonrotating) black hole directly. The double-imaging property is discussed with particular application to the recently announced double quasar ...
openaire   +3 more sources