| amplification | (electronics) the act of increasing voltage or power or current |
| amplification elaboration | addition of extra material or illustration or clarifying detail, a few remarks added in amplification and defense, an elaboration of the sketch followed |
| microwave spectroscopy | the use of spectroscopy to study atomic or molecular resonances in the microwave spectrum |
radiotherapy
radiation therapy
radiation actinotherapy
irradiation | (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance |
positron emission tomography
PET | using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain) |
| radiation | the act of spreading outward from a central source |
emission
emanation | the act of emitting, causing to flow forth |
| field-emission microscope | electron microscope used to observe the surface structure of a solid |
| gas maser | a maser in which microwave radiation interacts with gas molecules |
laser
optical maser | an acronym for light amplification by stimulated emission of radiation, an optical device that produces an intense monochromatic beam of coherent light |
| maser | an acronym for microwave amplification by stimulated emission of radiation, an amplifier that works on the same principle as a laser and emits coherent microwave radiation |
microwave
microwave oven | kitchen appliance that cooks food by passing an electromagnetic wave through it, heat results from the absorption of energy by the water molecules in the food |
microwave bomb
E-bomb | a bomb that explodes in midair and releases a massive burst of electromagnetic energy sufficient to disable computers and telecommunications without killing people or damaging buildings |
| microwave diathermy machine | diathermy machine that uses microwave radiation as the source of heat |
| microwave linear accelerator | linear accelerator that uses microwaves |
positron emission tomography scanner
PET scanner | a tomograph that produces cross-sectional Xays of metabolic processes in the body |
radar
microwave radar
radio detection and ranging
radiolocation | measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects |
| radiation pyrometer | a pyrometer for estimating the temperature of distant sources of heat, radiation is focussed on a thermojunction connected in circuit with a galvanometer |
| acoustic radiation pressure | (acoustics) the pressure exerted on a surface normal to the direction of propagation of a sound wave |
amplification
gain | the amount of increase in signal power or voltage or current expressed as the ratio of output to input |
optic radiation
radiatio optica | a nerve pathway from the lateral geniculate body to the visual cortex |
| radiation | a radial arrangement of nerve fibers connecting different parts of the brain |
| Planck's radiation law | (physics) an equation that expresses the distribution of energy in the radiated spectrum of an ideal black body |
radiation pattern
radiation diagram
pattern | graphical representation (in polar or Cartesian coordinates) of the spatial distribution of radiation from an antenna as a function of angle |
| background radiation | radiation coming from sources other than those being observed |
| emission | the occurrence of a flow of water (as from a pipe) |
| radiation | the spread of a group of organisms into new habitats |
| adaptive radiation | the development of many different forms from an originally homogeneous group of organisms as they fill different ecological niches |
actinic radiation
actinic ray | electromagnetic radiation that can produce photochemical reactions |
alpha radiation
alpha ray | the radiation of alpha particles during radioactive decay |
beta radiation
beta ray
electron radiation | radiation of beta particles during radioactive decay |
black-body radiation
blackbody radiation | the electromagnetic radiation that would be radiated from an ideal black body, the distribution of energy in the radiated spectrum of a black body depends only on temperature and is determined by Planck's radiation law |
| ionizing radiation | high-energy radiation capable of producing ionization in substances through which it passes |
cosmic background radiation
CBR
cosmic microwave background radiation
CMBR
cosmic microwave background
CMB | (cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about . kelvin |
| cosmic radiation | radiation coming from outside the solar system |
electromagnetic radiation
electromagnetic wave
nonparticulate radiation | radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge |
| emission spectrum | spectrum of electromagnetic radiation emitted by a self-luminous source |
gamma radiation
gamma ray | electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength |
infrared
infrared light
infrared radiation
infrared emission | electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves |
light
visible light
visible radiation | (physics) electromagnetic radiation that can produce a visual sensation, the light was filtered through a soft glass window |
| radiation field | a field that represents the energy lost from the radiator to space |
| microwave | a short electromagnetic wave (longer than infrared but shorter than radio waves), used for radar and microwave ovens and for transmitting telephone, facsimile, video and data |
| neutron radiation | radiation of neutrons (as by a neutron bomb) |
radiation pressure
corpuscularadiation pressure | the minute pressure exerted on a surface normal to the direction of propagation of a wave |
| radiation | energy that is radiated or transmitted in the form of rays or waves or particles |
corpuscular radiation
particulate radiation | a stream of atomic or subatomic particles that may be charged positively (e.g. alpha particles) or negatively (e.g. beta particles) or not at all (e.g. neutrons) |
radio wave
radio emission
radio radiation | an electromagnetic wave with a wavelength between . cm to , m |
| microwave spectrum | the part of the electromagnetic spectrum corresponding to microwaves |
| solar radiation | radiation from the sun |
ultraviolet
ultraviolet radiation
ultraviolet light
ultraviolet illumination
UV | radiation lying in the ultraviolet range, wave lengths shorter than light but longer than X rays |