*Of course, in real scientific research, scientists do not rely on manually drawing points on graph paper to determine a best-fit straight line or to determine the line's slope or y-intercept.*Instead, they use a statistical technique known as linear regression, which computes the least-squares best fit of a straight line through a sequence of points.

*Of course, in real scientific research, scientists do not rely on manually drawing points on graph paper to determine a best-fit straight line or to determine the line's slope or y-intercept.Instead, they use a statistical technique known as linear regression, which computes the least-squares best fit of a straight line through a sequence of points.*

However, usually it is not possible to apply this formula directly, because, for instance, in many cases we do not know the original amount of the radioactive isotope when the rock was solidified.

Also, such a calculation does not provide us with any statistical error margin to double-check the result.

A related article on the age of the earth and geologic ages presented the current best known values for these dates: Ages.

The figures shown in that article are based on radiometric dating.

Some have said that young-earth creationists will not be convinced of the scientific ages of the earth and fossils until they can measure these dates with their own hands. As mentioned above, radiometric dating methods are the basis for the figures in the detailed charts of the geologic ages, an abbreviated version of which is shown above.

## Radiometric dating school class

But radiometric methods are also used heavily in day-to-day research in paleontology and evolutionary biology, in order to test certain hypotheses.Quantum mechanics is one of two cornerstones of modern physics (the other is general relativity), and has been precisely confirmed in thousands of very exacting experiments.For these reasons, scientists have considerable confidence in these dates when they are measured properly in accordance with procedures that have been developed and refined over several decades.Radiometric dating is rooted in the rates of radioactive decay of various isotopes, which rates have been measured carefully in numerous laboratories beginning in the early 20th century.Radioactive decay is in turn a very basic physical phenomenon, well understood as a consequence of quantum mechanics.If all we have is one data point, the formula above doesn't help much more than the original formula.But if we have multiple data points -- multiple measurements of different samples say within a single igneous rock, then these should all lie on a straight line, whose slope m is simply related to the age of the specimen by the formula m = e; instead, this original ratio actually comes out as a result of the calculation!The half-life T of this decay has been measured in careful laboratory measurements as T = 48.8 billion years.On the other hand, strontium-86 is a stable isotope.Along this line, a kickstarter-funded firm known as Consumer Physics has designed a handheld, consumer-oriented optical spectrometer, which can be used to measure the molecular constituents of an item (food items, etc.) that you shine its built-in light upon.This cannot be used for radiometric dating, but it does suggest advanced technology such as this is rapidly advancing and soon will be available to consumers.

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