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305 notícias encontradas para "light"
Foto: Zelch Csaba / Pexels
Saturn-ring-like laser emission from chiral polymeric microspheres
Controlling light within microscopic spaces is crucial for next-generation optical devices such as photonic integrated circuits and localized sensors. Microspheres formed of luminescent π-conjugated polymers act as optical resonators that confine and amplify light via whispering
Foto: Del Woodcock / Pexels
Galaxy mergers aren't always obvious
The galaxy Centaurus A is about 11 million light-years away and is the fifth-brightest galaxy in the sky. Because it's so bright, it's been studied extensively by amateur and professional astronomers alike. Also called NGC 5128, it's a starburst galaxy, meaning it's forming stars
Incredible new material makes heat programmable
A newly developed material can control and "program" heat, allowing it to direct thermal radiation, switch modes, and remember its settings without continuous power. The innovation could lead to smarter infrared sensors, better energy technologies, and memory devices that use lig
Foto: Wolfgang Weiser / Pexels
How tall and short trees can coexist in old growth forests
Forests are shaped by light competition. The trees that grow the tallest have access to the most sunlight, blocking the rays and rendering the shaded space around them inhospitable to shorter trees below. In this stem exclusion phase of forest succession, the shorter trees often
Catching hydrogen in the act: Tracking the absorption process over time
If you're looking for hydrogen on the elemental chart, it won't take you long to find it. It is right there at the beginning, the lightest possible material. One electron, one proton—that's it. Simple, minimalistic, the Marie Kondo of the elemental chart, but with enormous potent
Foto: Pixabay / Pexels
Low-e windows keep homes cool … but may set neighbours’ property on fire
Low-emissivity windows also keep houses warm in winter, but use on bowed glass can have magnifying-glass effectLow-emissivity or low-E window glass is a useful green technology for keeping buildings warm in winter and cool in summer … but a rare side-effect can set the neighbours
Programmable light simulates quantum matter across 300 processes without bigger circuits
A team of researchers at the University of Ottawa and its Nexus for Quantum Technologies Institute, in collaboration with researchers from Federico II University in Italy, has developed a programmable quantum simulator that shapes a beam of light to replicate how particles move t
Boxy forms and odd lights: US declassifies more UFO files
The US government published a fourth instalment of unresolved cases, promising to release more files on a rolling basis.
NASA space telescope maps magnetic fields of 'Lighthouse' pulsar
NASA space telescope maps magnetic fields of 'Lighthouse' pulsar
For the first time, scientists have used NASA's IXPE (Imaging X-ray Polarimetry Explorer) to directly measure the magnetic fields of PSR J1101−6101, a pulsar located within what is often referred to as the Lighthouse Nebula. The results provide new insight into the structure of s
Artificial hand reproduces human gestures using memory written into light-responsive polym
Danqing Liu from Eindhoven University of Technology explores how interactions with digital systems can be improved through the sense of touch. To achieve this, she develops advanced liquid crystal polymers that respond to light. Her work has recently been published in two scienti
Researchers find simple solution for extending the lifespan of LEDs made from glowing quan
Researchers find simple solution for extending the lifespan of LEDs made from glowing quan
A new study led by MIT researchers could drive the development of more energy-efficient digital displays—such as flat-screen TVs, augmented and virtual reality headsets, smartphone screens, medical imaging devices and even large-area ambient lighting surfaces—that also generate r
Visible light triggers three-step cascade to make 3D drug-like molecules
A team led by chemist Frank Glorius, a professor at the Institute of Organic Chemistry at the University of Münster, has developed a new light-driven reaction sequence. In this triple catalysis, one reaction step triggers the next like three dominoes in a row, toppling one after