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radiation
has definitions from the fields of physics,medicine,anatomy,zoology
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[ noun ] (physics) the physical phenomenon of radiating energy in the form of waves or particles
Used in print (Cornell H. Mayer, "Radio Emission of the Moon...)Measurements of polarization are presently limited by apparatus sensitivity and will remain difficult because of the low intensity of the planetary radiation at the earth . There have been few measurements specifically for the determination of the polarization of planetary radiation . The measurements made with the NRL 50 - foot reflector , which is altitude azimuth mounted , would have shown a systematic change with local hour_angle in the measured intensities of Venus and Jupiter if a substantial part of the radiation had been linearly polarized . Other_than this very significant result , most_of the information now available about the radio_emission of the planets is restricted to the intensity of the radiation . The concept of apparent black-body temperature is used to describe the radiation received from the moon and the planets . |
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[ noun ] (physics) the act of spreading outward from a central source
Used in print (Cornell H. Mayer, "Radio Emission of the Moon...)This result suggests a very high_temperature at the solid surface of the planet , although there is the possibility that the observed radiation may be a combination of both thermal and non thermal components and that the observed spectrum is that of a black_body merely by coincidence . For the case of Jupiter , the radio_emission spectrum is definitely not like the spectrum of a black-body radiator , and it seems very likely that the radiation reaching the earth is a combination of thermal radiation from the atmosphere and non thermal components . For the case of Jupiter , the radio_emission spectrum is definitely not like the spectrum of a black-body radiator , and it seems very likely that the radiation reaching the earth is a combination of thermal radiation from the atmosphere and non thermal components . Mars has been observed twice at about 3 - cm wave_length , and the intensity of the observed radiation is in reasonable agreement with the thermal radiation which might be predicted on the basis of the known temperature of Mars . Mars has been observed twice at about 3 - cm wave_length , and the intensity of the observed radiation is in reasonable agreement with the thermal radiation which might be predicted on the basis of the known temperature of Mars . Related terms |
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[ noun ] (medicine) the treatment of disease (especially cancer) by exposure to radiation from a radioactive substance
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[ noun ] (anatomy,zoology) a radial arrangement of nerve fibers connecting different parts of the brain
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[ noun ] (physics) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Synonyms Related terms inactivity act emission practice variation corpuscular_radiation space_walk |
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[ noun ] (medicine) syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; severe exposure can cause death within hours
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[ noun ] the spread of a group of organisms into new habitats
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