Articles tagged with Visible Light
Astronomers discovered a galaxy without a visible central bulge but with a massive black hole, challenging previous assumptions about the formation of supermassive black holes. The galaxy's black hole has a mass approximately 10,000 to 100,000 times that of the sun.
Researchers at Northwestern University have created a novel device that detects ultraviolet light 10 times more efficiently than the Hubble Space Telescope. The innovative detector uses gallium nitride material to block visible and infrared light, allowing astronomers to study important objects in the universe for the first time.
Researchers at Georgia Institute of Technology have demonstrated binary optical storage using nanoclusters of 2-8 silver atoms. The clusters can fluoresce when exposed to blue light, allowing for nondestructive reading with green light. This technique has the potential for high-density storage and parallel reading.
The tiny Sandia laser can generate white light, replacing gas-filled fluorescent tubes in offices and homes, with a lifespan of five to ten times longer. The technology also aids in detecting bioweapons and E. coli bacteria, reducing carbon emissions by approximately 350 million tons per year.
Tiny gold nanoclusters exhibit distinctly chiral properties, dramatically affecting polarized light absorption. The clusters' unique structure and conduction electron circulation produce a helical effect comparable to naturally-helical structures.
Researchers at NASA and the University of Alaska have discovered mysterious bursts of colored light in thunderstorms, known as sprites. These brief, fleeting phenomena contain a great deal of energy, which may be sufficient to drive novel chemical reactions, potentially impacting the Earth's protective ozone layer.
A new Hubble image captures the entire stellar life cycle in a single photograph, showcasing various stages of star formation and evolution. The galaxy NGC 3603 is home to multiple starburst clusters, young massive stars, and a blue supergiant nearing its supernova fate.
UT Southwestern researchers have created a novel protein cross-linking method that utilizes brief exposure to visible light to initiate bonding between proteins. This technique is about 1,000 times more efficient than existing chemical methods and allows for precise control over the reaction timing.
Researchers compiled a catalog of 200 nearby spiral galaxies and discovered that approximately 30% contain bar-shaped bands of stars, which are more common than thought. Infrared telescopes revealed the presence of these bars, indicating that galaxies have interacted with each other in the last 10 billion years.
Researchers at Rice University are developing chameleon-like nanoshells with tailored optical properties to enhance devices and materials. These nanoshells can manipulate different types of light and have potential applications in energy conservation, construction materials, and biomedicine.
Researchers have produced a new radio image revealing a supernova remnant and numerous pulsar candidates, showcasing the Milky Way's central region in unprecedented detail. The technique will be useful for astronomers to study the galaxy's major components.
Researchers have developed a process called hierarchical self-assembly, where hollow spheres stack themselves into larger structures to form photonic crystals. These materials can manipulate light in predictable ways, offering potential applications in optical data storage, telecommunications, and lighting systems.
Researchers at the Carnegie Institution for Science have isolated the protein that responds to UV-A/blue light, a crucial step in understanding plant growth and development. The discovery of NPH1 as the photoreceptor for phototropism has significant implications for agricultural research and future studies on plant development.
Researchers at Rice University have developed metal nanoshells, particles that can absorb or scatter light at virtually any wavelength, enabling new applications in energy-efficient paints and windows, solar collection materials, and chemical sensors. The team has also shown promise in extending their range to the far infrared.
Researchers found that ultraviolet light triggers a harmful chemical reaction in the skin, leading to premature aging and cancer. The study reveals that a natural component of human skin, previously thought to be a 'nature's sunscreen,' actually contributes to skin damage.
A Johns Hopkins study found that UV-B exposure from sunlight increases the risk of cortical cataracts in people of all ages and backgrounds. The researchers calculated a 10% increase in risk for every 0.01 'Maryland sun years' of exposure.
Scientists have discovered a cheap material that changes color in response to light, potentially revolutionizing energy-efficient windows. The material could regulate illumination levels, glare, heat gain and loss, making buildings use less energy.
Researchers have developed new 'green' materials derived from chlorophyll, which can be used to overcome limitations of photodynamic therapy (PDT) for treating bulky solid tumors. These materials can kill cancer cells in tissue culture and mice while minimizing side effects.
Researchers develop dendrimer supermolecules that funnel light energy through a tree-like structure, directing it to a central point. The nanostar molecule can convert ultraviolet light into visible light with up to 99% efficiency, making it suitable for various applications such as solar energy harvesting and optical sensors.
Researchers discovered new clues to biological clocks that pace daily activities, including the role of two proteins regulating light responses. Their findings link evolutionary spectrum from light perception to time keeping, paving way for detailing modern clock mechanisms in various organisms.
Researchers have discovered a powerful energy source inside the nucleus of a Seyfert galaxy, challenging previous theories and providing new insights into the formation of galaxies. The findings suggest that both types of Seyfert galaxies may harbor quasars, with the power source located behind an obscuring 'fat torus' or doughnut girdle.