How a Laser Works

Atomic energy exists in fixed amounts called "quanta." As an atom's electrons move up and down in energy, they absorb these quanta of energy from the environment or emit it back out into the environment. Lasers work by directing these random absorptions and emissions of quanta into an orderly beam. Click the buttons below to learn exactly how lasers do it!


Related Resources:

  • Video: Art Under a New Wavelength
  • Reporter’s Blog: Art In a New Wavelength
  • What's My Story: Ph.D. Research Assistant in Chemistry


GSK