The origin of highest-energy gamma radiation in the nearby radio galaxy Centaurus A could now be localised for the first time ...

One question in particular has vexed thinkers from Issac Newton to Albert Einstein: Is light a particle or a wave? "Whether light is a particle or a wave is a very old question," Riccardo Sapienza ...

Another possibility, however, is that the high-energy neutrino was created when an ultramassive cosmic ray particle slammed into particles of light, or "photons," left in the universe after some ...

The light travels in a straight line directly from the object to your eye. Ray diagrams are used to show the path that light takes. The rays of light are represented using straight lines ...

"We would like to understand the difference between these systems, which holds the clue to understand just how many cosmic rays are produced in the jets of microquasars." ...

The ray, it was surmised ... through space at—coincidence—the speed of light. Light, he concluded, is an "electromagnetic" wave. The particle versus wave debate wound up with a kind of ...

Using 'conventional' synchrotron light sources for X-ray imaging, many delicate samples ... piggy-backed on systems originally designed for particle physics applications, and both appear to ...

Take, for instance, quantum entanglement, which says that the state of one particle can be determined ... distances (seeming beyond the speed of light) whereas classical physics follows local ...

Depending on the density of the material, light will reduce in speed as it travels through, causing it to change direction. Ray diagrams can be used to show the path light takes when it is refracted.

Researchers have developed innovative methods to control the ionization of atoms and molecules using specially structured light beams, challenging traditional limits. This breakthrough could lead to ...

Summary: Researchers at the University of Ottawa have developed innovative methods to control the ionization of atoms and ...