How does radiometric dating is used to estimate absolute age


Confined as they are in these crystals, many scientists believe that the ratio of parent radioactive uranium to daughter lead atoms in zircons can be used to calculate the ages of the crystals. These tiny zirconium silicate crystals can survive seemingly intact despite erosion, changes in environment, and metamorphic conditions that radically alter most rocks. Therefore, the oldest zircons are considered to be the best indicators of what the early earth was like.

Measurement of the effects of electromagnetic radiation became a field of study as early as the end of 18th century. Measurement techniques varied depending on the effects under study and gave rise to different nomenclature. The total heating effect of infrared radiation as measured by thermometers led to development of radiometric units in terms of total energy and power. Use of the human eye as a detector led to photometric units, weighted by the eye's response characteristic. Study of the chemical effects of ultraviolet radiation led to characterization by the total dose or actinometric units expressed in photons per second. [1]


How does radiometric dating is used to estimate absolute age

How does radiometric dating is used to estimate absolute age



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