Speed matters. When an X-ray photon excites an atom or ion, making a core electron jump onto a higher energy level, a ...

Innovative optical tractor beam technology enables 40-cm pulling of micro-droplets, highlighting the role of photon momentum ...

Physicists tested light speed using cosmic gamma-ray bursts. Study confirms Einstein's prediction that all light colors travel at same speed.

Today is the turn of Redditor gothreepwood101, who asks "if I had a metal pole long enough to reach from the English coast to ...

Among its many uses, generative AI can now create practice questions. But can these questions aid learning, and how do they ...

President Donald J. Trump has launched a major national artificial intelligence initiative dubbed the “Genesis Mission,” aimed at transforming how scientific research is conducted in the United States ...

Physicists have demonstrated with unprecedented accuracy that the speed of light remains constant. In 1887, a landmark physics experiment was carried out by American researchers Michelson and Morley.

The effect, first predicted over 60 years ago and regarding objects traveling near the speed of light, has been lent support ...

Using a precisely aligned pair of laser beams, scientists can now hold a single aerosol particle in place and monitor how it ...

They recreate how a camera would see objects traveling at 99.9% of the speed of light, revealing surprising relativistic ...

Since then, countless experiments have confirmed that light always travels at the same speed in a vacuum — about 300,000 ...

A single sewing needle is tiny enough to slip through fabric unnoticed, yet physics suggests that if it somehow struck Earth at light speed, the result would look less like a pinprick and more like a ...