emission+of+rays
121Transmission electron microscopy — A TEM image of the polio virus. The polio virus is 30 nm in size.[1] Transmission electron microscopy (TEM) is a microscopy technique whereby a beam of electrons is transmitted through an ultra thin specimen, interacting with the specimen as it… …
122LOFAR — Infobox Telescope bgcolour = name = Low Frequency Array caption = LOFAR prototype antennas; this installation was succeeded by Core Station 1 (CS 1) in 2007 organization = ASTRON location = 3 kilometre!km north of Exloo, the Netherlands (core)… …
123Geminga — Starbox short name = Geminga epoch = J2000.0 constell = Gemini ra = RA|06|33|54.15 dec = DEC|+17|46|12.9 appmag v = ? dist ly = 552 dist pc = 169 spectral = Pulsar names = SN 437, PSR B0633+17Geminga, is a neutron star approximately 552 light… …
124Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
125actinide element — ▪ chemical element group Introduction any of a series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89–103). As a group they are significant largely because of their radioactivity.… …
126Dark matter — Not to be confused with antimatter, dark energy, dark fluid or dark flow. For other uses, see Dark Matter (disambiguation) …
127Electromagnetic radiation — Electromagnetism Electricity · …
128Nuclear fusion — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical dec …
