heat ray Definition

beam, beamless, actinic radiation, emicant, calorescence, embeam, infrared lamp, wollaston prism, compton effect, diradiation, rutilate, luminous energy, radiant energy, pyrheliometer, effulge, beamful, scintillation counter, holophote, infrared, spectrohelioscope, holophotal, absorption band, magnetic lens, radiately, ray of light, photofission, torsel, optical device, anaclastics, actinal, beta radiation, alpha radiation, tyndall effect, spectroheliograph, nicol prism, tithonic, photomagnetic, spectral type, radiation pyrometer, tithonographic, tiebeam, exposure meter, microwave spectroscopy, corpuscular radiation, photonuclear, background radiation, radiomicrometer, lucimeter, diactinic, stauroscope, radiophobia, biradiate, photon, photodisintegration, box girder, arc lamp, solar telescope, radiation, parhelic circle, heliometer, zeeman effect, optical phenomenon, thermal neutron, abactinal, dioptrics, infrared radiation, angle of refraction, light meter, dynactinometer, optogram, beta particle, discharge tube, triradiate, cosmic background radiation, otheoscope, glow discharge, hodoscope, scalebeam, diathermanous, photovoltaic effect, adiactinic, perspicil, wavelength, optography, photoscope, light, helioscope, beambird, visible spectrum, solar constant, candent, clinographic, corradiate, source of illumination, diacaustic, selenium cell, magnetic moment, electric eye, actinotherapy, trichroism,