radiometric$66507$ - definition. What is radiometric$66507$
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TECHNIQUES FOR MEASURING ELECTROMAGNETIC RADIATION
Radiometric; Spectroradiometry; Spectral radiometric quantity; Radiometrics

Radiometric dating         
  • archive-date=31 March 2009 }}</ref>
  • [[Apatite]] crystals are widely used in fission track dating.
  • Lu-Hf]] isochrons plotted of meteorite samples. The age is calculated from the slope of the isochron (line) and the original composition from the intercept of the isochron with the y-axis.
  • bibcode = 2001JAfES..32..103V }}</ref> All the samples show loss of lead isotopes, but the intercept of the errorchron (straight line through the sample points) and the concordia (curve) shows the correct age of the rock.<ref name=Rollinson/>
  • [[Thermal ionization mass spectrometer]] used in radiometric dating.
  • β<sup>−</sup> decay]]. The final decay product, lead-208 (<sup>208</sup>Pb), is stable and can no longer undergo spontaneous radioactive decay.
A TECHNIQUE USED TO DATE MATERIALS SUCH AS ROCKS OR CARBON
Radioactive dating; Isotope dating; Radiometrically dated; Radioactive Dating; Rock dating; Isotopic dating; Rock Dating; Radiological dating; Radiogeology; Radioisotope dating; Radiation-Damage Dating; Radiodating; Radiometric age dating; Chemical dating; Isotopic date; Radioactive age dating; Radioisotopic dating; Radioisotopically dated; Radiochronometry; Radioisotopic
Radiometric dating, radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay.
Radiometry         
·add. ·noun The use of the radiometer, or the measurement of radiation.
radiometric         
¦ adjective Physics relating to the measurement of radioactivity.
Derivatives
radiometrically adverb

ويكيبيديا

Radiometry

Radiometry is a set of techniques for measuring electromagnetic radiation, including visible light. Radiometric techniques in optics characterize the distribution of the radiation's power in space, as opposed to photometric techniques, which characterize the light's interaction with the human eye. The fundamental difference between radiometry and photometry is that radiometry gives the entire optical radiation spectrum, while photometry is limited to the visible spectrum. Radiometry is distinct from quantum techniques such as photon counting.

The use of radiometers to determine the temperature of objects and gasses by measuring radiation flux is called pyrometry. Handheld pyrometer devices are often marketed as infrared thermometers.

Radiometry is important in astronomy, especially radio astronomy, and plays a significant role in Earth remote sensing. The measurement techniques categorized as radiometry in optics are called photometry in some astronomical applications, contrary to the optics usage of the term.

Spectroradiometry is the measurement of absolute radiometric quantities in narrow bands of wavelength.