Light does not travel at the same speed in all directions under the effect of an electromagnetic field. Although predicted by theory, this counter-intuitive effect has for the first time been demonstrated experimentally in ...
General Physics
May 13, 2011
27
0
Unlike fictional laser swords, real laser beams do not interact with each other when they cross—unless the beams meet within a suitable material allowing for nonlinear light-matter interaction. In such a case, wave mixing ...
Optics & Photonics
May 20, 2022
2
295
Space, the final frontier. The starship Enterprise pursues its mission to explore the galaxy, when all communication channels are suddenly cut off by an impenetrable nebula. In many episodes of the iconic TV series, the valiant ...
Optics & Photonics
May 31, 2022
12
848
New ground-breaking research from the University of Surrey could change the way scientists understand and describe lasers—establishing a new relationship between classical and quantum physics.
Optics & Photonics
Jul 10, 2020
3
676
Scientists who threw down the gauntlet to physics by reporting particles that broke the Universe's speed limit said on Friday they were revisiting their contested experiment.
General Physics
Oct 28, 2011
146
0
Using a novel method, beams of laser light can be deflected using air alone. An invisible grating made only of air is not only immune to damage from the laser light, but it also preserves the original quality of the beam, ...
Optics & Photonics
Oct 3, 2023
11
1021
At human scale, controlling temperature is a straightforward concept. Turtles sun themselves to keep warm. To cool a pie fresh from the oven, place it on a room-temperature countertop.
Nanomaterials
Aug 10, 2019
0
490
(PhysOrg.com) -- In a recent study, researchers have examined the possibility of rolling a nanorod on the surface of water. On the macroscale, perhaps the closest analogy might be the sport of logrolling, in which two competitors ...
A special bonding state between atoms has been created in the laboratory for the first time: With a laser beam, atoms can be polarized so that they are positively charged on one side and negatively charged on the other. This ...
Optics & Photonics
Aug 1, 2022
0
696
In a compost heap, the nematode Caenorhabditis elegans finds a richly laid table: at a length of just one millimeter, the worm feeds on bacteria that decompose organic material. It is essential that the animal avoids sunlight—and ...
Biotechnology
Aug 2, 2023
0
4
