Articles tagged with Speed Of Light
Researchers have created and controlled surface plasmon wakes of light-like waves on a metallic surface, demonstrating a new technology with potential applications in nanotechnology and optics. The discovery uses a faster-than-light running wave of charge along a metamaterial to create and steer the wakes.
Astronomers have discovered a rare collision between two high-speed knots of ejected matter in a supermassive black hole jet. The finding suggests that shocks produced by collisions within the jet accelerate particles and brighten the regions of colliding material.
Researchers at the University of the Witwatersrand have demonstrated the first observation of angular acceleration in laser light, which can be controlled with a single parameter. This breakthrough could lead to new applications using structured light fields.
Researchers have successfully slowed down light to 180 km/h using a glass fiber, allowing for the storage of photons and potentially enabling quantum communication over long distances. This breakthrough technology uses cesium atoms coupled to an ultrathin glass fiber to transfer photon information in a controlled manner.
Researchers at ICFO have discovered a material system that enables highly confined low-loss plasmons in graphene-boron nitride heterostructures, allowing for efficient optical sensing and computing. This breakthrough paves the way for extremely miniaturized optical circuits and devices.
Researchers propose using photonic booms to map asteroid surfaces and study celestial objects, offering new insights into the universe. High-speed cameras could capture these flashes, revealing previously unknown information about asteroids and other cosmic bodies.
Researchers at Technische Universität Darmstadt confirm time dilation and observe spectral lines in highly charged bismuth ions, achieving unprecedented precision. The experiments test the limits of Einstein's theories under extreme conditions, providing new insights into quantum electrodynamics.
Researchers from NIST and University of Maryland's Joint Quantum Institute found that speeding up part of a light beam past the speed of light results in lost quantum data. The team explored what this means for quantum information transfer in quantum computers, suggesting that quantum noise and distortion set an information speed limit.
Researchers have developed novel devices that can be turned on and off using light, enabling a new wave of highly efficient electronics. The breakthrough is crucial for performing computations, which rely on a series of on-off switches.
A U of A research team has identified a giant cosmic accelerator above the Earth, accelerating particles to near-light speeds within the Van Allen radiation belt. The discovery could improve space weather forecasts and protect man-made systems from damage.
A team of astronomers discovered that black hole jets contain ordinary atoms, including nickel and iron, which provide the positive charge. The jets are accelerated to high speeds, with some moving at 66% of the speed of light, revealing new insights into their formation.
The study found that shortening yellow duration and increasing speed limits increase the chance of drivers running a red light, while shortening cycle lengths do not impact safety. The researchers suggest a combination of strategies could produce adequate revenue without causing traffic delays or congestion.
Scientists have developed a new technique to slow down light by embedding dye molecules in a liquid crystal matrix, allowing for more efficient sensing and interferometry applications. The method uses little power, operates at room temperature, and can measure extremely low speeds in just one second of measurement time.
Researchers used dysprosium to measure electron velocity and found the maximum speed of an electron is consistent with the speed of light. The experiment pushes the limits of Einstein's theory, potentially revealing new insights into particle physics.
Recent studies suggest that the speed of light may fluctuate due to ephemeral vacuum particles, which could be testable with ultra-fast lasers. Researchers propose that physical constants like speed of light are indications of total elementary particles in nature.
A new study using data from NASA's Swift satellite and Fermi Gamma-ray Space Telescope shows that high-speed jets launched from active black holes possess fundamental similarities regardless of mass, age or environment. The result provides a tantalizing hint that common physical processes are at work.
Researchers propose an inequality that probes the role of signals in quantum predictions, exposing how they challenge Einstein's theory of relativity. The test, feasible in the near future, will measure a single number, potentially revealing faster-than-light communication or infinitely fast influences.
Astronomers have discovered a supersonic jet of material from a supermassive black hole at the center of a distant galaxy, resembling an afterburner flow. The jet exhibits bright and dark regions, including regularly spaced areas brighter than the rest, which may provide insight into its formation and power.
New research reveals that runaway planets exist and can reach speeds of up to 30 million miles per hour, outpacing most objects in the Galaxy. These hypervelocity planets are produced by double-star systems interacting with supermassive black holes.
New research identifies the 'dilemma zone' before a stoplight intersection where drivers are unsure whether to stop or go ahead. The study proposes using advanced technology and fuzzy logic to improve yellow-light timing and reduce driver confusion.
Astrophysicists have uncovered new questions and clarified previous theories about gamma-ray bursts using the Fermi Gamma-Ray Space Telescope. The telescope's unique view allows it to capture the highest energy portion of these bursts, which are difficult to detect due to their brief duration and narrow radiation patterns.
Delegates explored ways to overcome propulsion limitations, including suspended animation and negative mass concepts. Theoretical models offer tantalizing options, but significant hurdles remain before interstellar travel becomes a reality.
Researchers found that pion decays would produce superluminal neutrinos only if energy and momentum were conserved. However, the OPERA experiment's results cannot be replicated under current physics. The creation of high-energy neutrinos is also supported by observations from IceCube.
Scientists at Vienna University of Technology have developed a new method to detect single atoms using ultra-thin glass fibers, allowing for precise measurement of tiny amounts of substances. The technique enables the control of quantum states without destroying them.
Scientists at Chalmers University of Technology have succeeded in creating light from vacuum by capturing photons that appear and disappear in the vacuum. The experiment confirms a fundamental principle in quantum mechanics, demonstrating the existence of virtual particles that can become real photons.
Electrons in graphene exhibit Klein tunneling, allowing them to pass through energy barriers regardless of width and height. This phenomenon has been observed experimentally in graphene.
Cornell researchers demonstrate ability to cloak a singular event in time using light and optical fibers. A brief bubble in the light flow conceals the fact that an event occurred, lasting only a fraction of a second.
Researchers developed a new chip using SPIDER technology to measure ultrafast optical pulse intensity and phase without expensive equipment. The breakthrough paves the way for applications in metrology and optical telecommunications.
Researchers have created a technique to control the speed and direction of light using memory metamaterials, which can repeatedly change their properties. This innovation enables the manufacture of Gradient Index of Refraction (GRIN) devices for imaging and communication technologies with unprecedented precision.
A young researcher has successfully designed an optical device that can slow down light, enabling the creation of a practical invisibility cloak. This breakthrough could allow for the development of camouflage technology in various colors and scenarios.
A new type of invisibility cloak can hide events, not just objects. Researchers suggest a thief could use an 'event cloak' to steal money from a safe by manipulating light speed. Suitable materials need to be developed to make this possible.
Researchers from Imperial College London have developed a space-time cloak that can conceal events, making it theoretically possible for objects to move undetected. The cloak exploits metamaterials to create undetectable blind spots in light or sound waves.
Scientists at UC Santa Cruz and Brigham Young University have created an optical device that slows down light by a factor of 1,200, enabling potential vast improvements in ultra-low-power performance. The breakthrough holds promise for all-optical quantum communication networks.
Astronomers using NASA's Rossi X-ray Timing Explorer (RXTE) satellite have confirmed that most of the X-rays in a binary system come from the dual, oppositely directed jets around a black hole. The study provides new insights into the complex behavior of these systems and their extreme environments.
Scientists have found a supernova explosion that exhibits characteristics of a gamma-ray burst but lacks gamma rays. The discovery using the National Science Foundation's Very Large Array radio telescope promises to aid in locating more examples of these mysterious events.
The Fermi Gamma-ray Space Telescope has detected high-energy gamma-rays from the enigmatic binary system Cygnus X-3, a genuine microquasar. The system's unique properties and strong emission across various wavelengths offer new insights into how high-energy particles are accelerated and move through jets.
A team of physicists has directly observed a reverse shock wave of light in a specially tailored structure known as a left-handed metamaterial. This is the first unambiguous experimental demonstration of reversed Cerenkov radiation, a phenomenon predicted over forty years ago.
The Fermi telescope has mapped over 1,000 discrete sources of gamma rays, exceeding previous knowledge. It has also detected a short gamma ray burst, eliminating approaches to new theories of gravity that predict energy-dependent changes in the speed of light.
Advances in optics and photonics are transforming our daily lives with innovations like optical fibers, lasers, and medical imaging techniques. Researchers are now exploring the potential of plasmonics to develop metamaterial-based invisibility cloaks and super-strength solar cells.
Direct measurement of graphene's energy spectrum reveals unevenly spaced energy levels and a 'zero energy state.' The findings support the idea that graphene layers are uncoupled from adjacent layers due to their unique stacking orientations.
Researchers have developed a plasmonic switch using molecular machines, which can transmit electrons and light simultaneously. This technology has the potential to enable ultra-small computers with high storage capacity and processing speed.
Researchers have created a material that can reflect light from all angles, overcoming optical singularities. This breakthrough could lead to the development of perfect cat's eyes and invisibility devices. The discovery is based on transformation optics and has potential applications in wireless technology and radar.
Researchers at Penn have developed a theoretical framework for increasing the speed of light pulses in nanoscale metal chains, potentially enabling high-speed optical computing. The discovery may overcome limitations in optics and pave the way for novel optoelectronic devices.
Researchers from Princeton University have discovered that electrons in bismuth display a highly unusual pattern of behavior under a powerful magnetic field at ultra-low temperatures. This phenomenon, known as a collective state, is a manifestation of quantum mechanics and could lead to new paradigms in computing and electronics.
NASA's GLAST mission was launched successfully aboard a Delta II rocket from Cape Canaveral Air Force Station in Florida. The observatory is now on-orbit, with all systems operating as planned.
The Delta II rocket carrying NASA's Gamma-ray Large Area Telescope (GLAST) is being assembled at Cape Canaveral Air Force Station. The rocket, fueled by nine solid rocket motors, will search for signs of new laws of physics and explore the universe's most extreme environments.
Physicists at RHIC have developed a way to measure subtle fluctuations in particle beams and send corrections ahead to smooth out scattering. This technique, called stochastic cooling, aims to recreate the conditions of the early universe, potentially saving time and money.
Researchers aim to develop an instrument that can reveal crucial data about the nature and origin of cosmic rays. Cerenkov radiation, emitted when particles travel faster than light through the atmosphere, holds key to understanding these enigmatic particles.
The GRB's ejecta slam into interstellar gas, producing a bright X-ray afterglow that can radiate for several days. The slow fading of the afterglow suggests a larger energy injection than typical GRBs, with possible explanations including magnetar-powered engines.
Researchers at Ames Laboratory have successfully created metamaterials that can refract light at negative angles, potentially enabling the development of superlenses for medical imaging. This achievement demonstrates a new way to manipulate light's path and speed, moving closer to Einstein's theory of relativity.
Physicist Robert Boyd has successfully demonstrated negative-speed pulses of light, where a pulse travels backwards within an optical fiber. The researchers used erbium-doped fibers to slow down and speed up the light pulse, creating a 'hump' shape with leading and trailing edges.
MIT physicists and NIST colleagues report the most precise direct test yet of Einstein's E=mc^2, verifying the formula's accuracy with an unprecedented precision. The team's findings validate the equivalence of energy and mass, strengthening the theory's position in modern physics.
Researchers at EPFL successfully demonstrate controlling the speed of light in an optical fiber, slowing it down by a factor of 3.6 and speeding it up to exceed the speed of light without violating relativity. This breakthrough has significant implications for optical computing and telecommunications.
A scientist at Berkeley Lab has re-examined the 2002 experiment claiming to measure the speed of gravity and found that it was based on a flawed assumption. The correct formula yields effects significantly smaller than initially thought, making measurement with current technology impractical.
A previously unseen band of stars beyond the edge of the Milky Way galaxy has been discovered, approximately 120,000 light years in diameter. The discovery supports the theory that at least part of our galaxy was formed by many smaller or dwarf galaxies mixing together.
Engineers at Johns Hopkins University have developed a cost-effective method to speed up microchip communication by using light beams instead of metal wires. The new technology, known as silicon on sapphire, takes advantage of the unique properties of this material to reduce power consumption and increase data transfer speeds.
Researchers at Texas A&M University have devised a method to stop light, utilizing the EIT phenomenon to slow down photons in a gas cell. This breakthrough could enable new applications for quantum computing and modern nonlinear optics.
John Moffat, a University of Toronto professor, proposes that the speed of light was not always constant but rather increased over time. This theory could help explain recent discoveries about the accelerating expansion of the universe and provide an answer to some cosmology problems.
Scientists at Oak Ridge have invented an aluminum-based propellant allowing for varying speed control. This technology enables the use of rubber bullets with reduced lethality, avoiding fatal outcomes at close range.
Researchers at Max Planck Institute found that moving objects appear slower through rod photoreceptors than cone photoreceptors, especially under low light conditions. This underestimation can lead to compensatory speeding-up, which may be fatal.