A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.

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 …

Dec 25, 2025 · A laser uses a pair of mirrors facing each other—an optical resonator—to build up the light energy in the beam. As light bounces back and forth between the mirrors, it passes …

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

May 24, 2025 · Though laser physics was born from quantum ideas, the laser itself became a tool for probing even deeper into quantum mechanics. Today, researchers use lasers to explore …

Lasers: Understanding the Basics Although lasers range from quantum-dot to football-field size and utilize materials from free electrons to solids, the underlying operating principles are …

Lasers are devices that concentrate beams of light by forcing their waveforms and frequencies to align. First developed in the 1960s to amplify microwaves, modern lasers technology can ramp …

Jul 31, 2023 · Laser pointers work through the principles of light amplification and stimulated emission. Inside a laser diode, which is designed to produce a concentrated beam, a process …

Sep 25, 2025 · Light travels in waves, and the distance between the peaks of a wave is called the wavelength. Each color of light has a different wavelength. For example, blue light has a …

Lasers produce highly focused, single-wavelength light that powers applications from medical surgery to industrial cutting. By harnessing quantum mechanics and precise engineering, …