klystron
magnetron
maser
rectenna
microwave radiation
microwave spectroscopy
photomultiplier tube
amplitron
source of illumination
travelling-wave tube
band
microwave spectrum
microwaveguide
helitron
resnatron
thermionic valve
electron spin resonance
penetrometer
ESR
electron paramagnetic resonance
gas maser
pickup
photodetector
gyrotron
gamma radiation
lens
spectrophotometer
reflector
spurline
radio-frequency
photo-
infrared
reemit
fluoresce
photophone
absorption spectrum
photoelectrolysis
low-noise block downconverter
horn antenna
wave guide
waveguide
dish
yoke
actinometer
dish antenna
super high frequency
curtain array
radio energy
photoradiometer
fluorescent lamp
dish aerial
saucer
X-ray tube
spark counter
CMB
acoustoelectronics
cathode ray
spark chamber
bolometer
microlidar
television-camera tube
birdie
television pickup tube
graser
space wave
microwave linear accelerator
beamstrahlung
light-emitting diode
spectrum analyzer
Geiger counter
photoinitiated
radar echo
electromagnetic wave
cloud chamber
electron multiplier
gyrotropy
luminescent screen
X-ray
Geiger-Muller counter
rocking beam
phase shifter
coil winder
decoder
microstrip
radiatively
driven element
downconversion
electron lens
gamma ray
radioprobe
X-radiation
nuclear magnetic pulse
asteriated