laser, infrared, diffracted, collimator, gamma rays, diffraction grating, ultraviolet light, particle beam, photons, electron beam, collimated, diffraction, wavelength, infrared radiation, ion beam, photometer, spectroscope, photodetector, parabolic reflector, cherenkov radiation, tracer, ionizes, gamma ray, photocell, spectrometer, beam, parabolic mirror, fluorescence, reticle, plasmon, detector, cosmic ray, unpolarized, electromagnet, scintillator, galvo, interferometer, electron, penlight, piezoelectric crystal, ionised, galvanometer, illuminator, polarimetry, electromagnetic, projectile, rays, photoemission, monochromator, waveguide, magnetic dipole, ultraviolet, ionosphere, chromophore, fluorescent dye, attosecond, alpha particle, cosmic rays, photoelectron, circular polarization, micromanipulator, optically, neutron radiation, muons, radiometer, positrons, refraction, coronagraph, electrode, refractive index, pulsed, arrow, photometry, gimbaled, diffractive, aperture, comet, optic, neutron, wavefront, electroluminescence, strobe light, magnetron, phonon, electron accelerator, reflector, spectrally, hypervelocity, particle, searchlight, photometric, strobe, excitation, backscattering, convex lens, dipole moment, perpendicularly, calorimeter, undulator, gamma radiation, photodiode, kev

beam, beam of light, light beam, ray, ray of light, shaft, shaft of light