Tag

Ultraviolet

All articles tagged with #ultraviolet

astronomy4 hours ago•56 min saved

Private Mauve telescope captures first starlight, signaling a new era in commercial astronomy

The suitcase-sized Mauve telescope, created by Blue Skies Space, made its first observation by targeting the bright star eta Ursa Majoris (104 light-years away), recording visible and ultraviolet light in a five-second exposure. This marks the debut measurements for a privately funded space telescope and could help scientists identify nearby stars that host potentially habitable exoplanets, while supporting a growing commercial astronomy sector.

via Space|

#astronomy #eta-ursa-majoris #exoplanets

earth-science6 days ago•15 min saved

Storm Sparks UV Glows on Tree Tips Confirmed in the Wild

A Penn State–led team captured the first in-the-wild coronae—brief ultraviolet glows at leaf tips—during thunderstorms, logging 41 events on multiple tree species across the East Coast in about 90 minutes. Each glow lasts roughly three seconds and can hop between leaves. While coronae had been seen in laboratory tests, this study confirms they occur in nature and may light tens to hundreds of treetop leaves during a single storm, though the displays are invisible to the naked eye.

via Gizmodo|

#coronae #earth-science #electrical-discharges

science12 days ago•5 min saved

Deer Glow: Ultraviolet Signposts Reveal Hidden Forest Communication

University of Georgia researchers found that white-tailed deer rubs and ground scrapes glow under ultraviolet light (365 and 395 nm), suggesting deer may communicate using UV-visible ‘signposts’ in the forest. Irradiance measurements showed these spots were brighter than the surroundings, though whether the glow comes from deer secretions, plant compounds, or both remains unclear. The study analyzed 109 rubs and 37 scrapes in a Whitehall Forest during two fall surveys in 2024, and the findings point to a possible new form of deer communication, published in Ecology and Evolution.

via ScienceAlert|

#deer #ecology #photoluminescence

technology1 month ago•6 min saved

Galaxy S26 Ultra color lineup leaks confirm four shades, including Ultraviolet

A new leak of SIM-slot images reportedly confirms four Galaxy S26 Ultra colors—Black Shadow, White Shadow, Galactical Blue, and Ultraviolet—matching prior reports, with online-exclusive variants likely; the piece also notes expected charging speed upgrades and a privacy display.

via PhoneArena|

#black-shadow #color-options #leak

science2 months ago•4 min saved

New Insights Suggest Changes in Black Hole Fundamentals

Recent research suggests that the relationship between ultraviolet and X-ray emissions in quasars has changed over billions of years, challenging long-held assumptions about the uniformity of matter surrounding supermassive black holes and impacting methods used to study the universe's structure and evolution.

via ScienceDaily|

#black-holes #cosmology #quasars

science-and-technology2 years ago•4 min saved

"Breakthrough: Scientists Unveil Full-Spectrum Laser with Unprecedented Intensity"

Scientists have developed a cascaded architecture of gas-filled hollow-core fiber, a lithium niobate crystal plate, and a specially designed chirped periodically poled lithium niobate crystal to generate an intense four-octave-spanning ultraviolet-visible-infrared (UV-Vis-IR) full-spectrum laser. By harnessing the synergic action of second-order nonlinear (2nd-NL) high harmonic generation (HHG) and third-order nonlinear (3rd-NL) self-phase modulation (SPM) effects, the laser achieves an extremely large bandwidth, high-flatness spectral profile, and large pulse energy. This breakthrough could have applications in optical spectroscopy, physics, chemistry, biology, materials science, information technology, industrial processing, and environmental monitoring.

via Phys.org|

#full-spectrum #infrared #laser

technology2 years ago•3 min saved

Metamaterials Revolutionize Holography's Spectrum Possibilities.

Researchers at Pohang University of Science and Technology have developed a method for generating meta-holograms in both the visible and ultraviolet spectral regions, overcoming prior limitations. They also devised a way to encode two distinct holographic phase profiles onto a single metasurface, leveraging polarization characteristics and liquid crystal, leading to potential applications in security technologies such as anti-counterfeiting measures, identifications, and passports.

via SciTechDaily|

#holography #liquid-crystal #metamaterials