A laser differs from other sources of light in that it emits light that is coherent. Spatial coherence allows a laser to be focused to a tight spot, enabling uses such as optical communication, [6] laser cutting, …

Dec 25, 2025 · Laser, a device that stimulates atoms or molecules to emit light at particular wavelengths and amplifies that light, typically producing a very narrow beam of radiation. The emission generally …

Nov 28, 2024 · An easy-to-understand explanation of how lasers work, with a simple diagram showing what's inside a laser.

Sep 25, 2025 · Because laser light stays focused and does not spread out much (like a flashlight would), laser beams can travel very long distances. They can also concentrate a lot of energy on a very …

The most powerful laser designed to date can be found at the European Extreme Light Infrastructure facility in Romania. Its lasers are some of the most intense in the world, generating insanely brief …

A laser is created when electrons in the atoms in optical materials like glass, crystal, or gas absorb the energy from an electrical current or a light. That extra energy “excites” the electrons enough to move …

Jul 31, 2023 · But what is a laser? What makes a laser beam different from the beam of a flashlight? Specifically, what makes a laser light different from other kinds of light? How are lasers classified? In …

May 29, 2025 · The word “laser” is an acronym for “light amplification by stimulated emission of radiation.” Lasers have many uses, including cutting and welding materials, measuring distance, and …

Dec 17, 2025 · A quality laser printer delivers unparalleled speed, pristine text, and reliable paper handling. Find the right option for your home or office from our list of tested picks.

Mar 29, 2024 · But what, exactly, are lasers, and how do they work? The word "laser" is actually an acronym; it stands for "light amplification by stimulated emission of radiation."