Carbon dating accurate not datingservice ru
Generally speaking, a scientific report will include an indication of the confidence in the measurement.This may make it sound like a bad deal, but it's also important to note these measurements are generally not used in isolation, but in combination with other dating techniques, which both allow us to build confidence (they tend to line up well in a predictable fashion, which we wouldn't expect with random results) and also discard outliers (like if some event totally messed up the results, we can see the discrepancy and discard the bad finding).The oldest dates we can measure using this method is around 50,000 years before it becomes less accurate.There will simply be less and less carbon to measure, decreasing accuracy.We know that the decay rate of carbon, which has a half life of 5730 years.So when we sample a specimen and find out how much radiocarbon there is left, we can use the decay rate to find out quite precisely when that organism died.
An example, with completely made-up numbers: Say that the standard for living things is that 10% of their carbon is carbon-14 (this is way too high, but it makes the numbers easier).
If we find a dead body with 5% carbon-14, we know it died around 5,730 years ago.
If it has 2.5% carbon-14, it died around 11,460 years ago.
Within that 50,000 year range, however, radiocarbon dating is very accurate.
To find the age of things older than that we would need a different radiometric dating method Carbon-14 is a type of carbon (a very common element) with 8 neutrons.
The more time that has passed, the less radioactive carbon to carbon.