When a plate drops or a glass smashes, you're annoyed by the mess and the cost of replacing them. But for some physicists, ...

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.

New research has uncovered an unexpected flaw in Einstein’s theory of relativity — a gap that no one had the tools to detect ...

A laser is usually constructed from two basic elements: a material that provides optical gain through stimulated emission and an optical cavity that partially traps the light. When the total gain in ...