photomultipliers, emittance, pyrometers, phototransistor, bistable, photoconductive, photometer, josephson junction, diffraction grating, emissivity, illuminance, photodiodes, electrolytic capacitor, bolometer, cadmium sulfide, fresnel lens, photodetector, scintillator, humidistat, monochromator, bimetal, crystal oscillator, sensors, peltier, thermistor, electret, ammeter, microwatt, electromotive force, diodes, bypass capacitor, resonant cavity, stroboscope, piezoelectric crystal, thyristor, photolysis, variable resistor, photodiode, photocurrent, halide, ultraviolet lamp, cold cathode, reflectors, cuvette, dipole antenna, galvanometer, photomultiplier, detectors, dipole moment, fluorescent lamp, fluorometer, ferrites, corona discharge, microbalance, thermocouples, pellicle, spectro, infrared ray, arrays, polyphase, vaporisation, fluorocarbons, microswitch, potentiometer, handwheel, opto, annunciator, infrared, millivolt, electroluminescence, fiducial, demagnetization, tachometers, absorption coefficient, passband, waveband, absorbance, collimating, electrophoretic, photoflash, economizer, ionisation, transmissivity, subminiature, paramagnetic, plasmon, illuminant, magnetoresistance, triode, iris diaphragm, resonators, heliostat, retroreflector, demultiplexer, absorbers, spectrophotometer, adiabatic, impedances, microspectrophotometer, circular polarization, voltage divider, polarimeter, transistors, leds, phosphors, rectifiers, thermometers, triodes, amplifiers, cameras, spectrometers, transducers, transformers, binders, capacitors, counters, dosimeters, modules

atomic number 34, se, selenium