Example image of eyePlorer eyePlorer map for 'Laser': Electromagnetic radiation Light Stimulated emission Beam divergence Coherence (physics) Lens (optics) Phase (waves) Electromagnetic spectrum Wavelength Acronym and initialism Visible spectrum Infrared Maser Microwave Radio frequency Ultraviolet X-ray Bell Labs Back-formation Atom laser Active laser medium Optical cavity Output coupler Optical amplifier Light beam Laser pumping Flashtube Gas Liquid Plasma (physics) Solid State of matter Excited state Quantum state Population inversion Resonator Exponential growth Lasing threshold Gaussian beam Optical fiber Gaussian function Hermite polynomials Laguerre polynomials Transverse mode Collimated light Diffraction Earth Helium–neon laser Moon Quantum mechanics