The constancy of the speed of light is a pillar of modern physics, but questions persist about its absolute universality.

An experiment has visualized a prediction about objects traveling at the speed of light known as the Terrell-Penrose effect, ...

Addressing a controversy first raised around 1910, two physicists have performed experiments with the aid of an engineer that validate anew the special theory of relativity’s limitations on the speed ...

In 1887, one of the most important experiments in the history of physics took place. American scientists Michelson and Morley ...

The Italian professor who led an experiment that initially appeared to challenge one of the fundaments of modern physics by showing particles moving faster than the speed of light has resigned after ...

In 1999, a Danish physicist named Lene Hau did the unthinkable. She slowed the speed of light. It was a remarkable move that completely changed our idea of universal constants. Since then, Hau has ...

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

A new proposed experiment testing Albert Einstein's idea on the speed of light could turn the Theory of Relativity on its head. Nathan Rousseau Smith (@fantasticmrnate) explains. A new proposed ...