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] …

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 …

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 …

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, …

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 …

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 …

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 …

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."