Proving carbon dating
In the same way the C-14 is being formed and decaying simultaneously.
Willard Libby invented the carbon dating technique in the early 1950's.The amount of carbon 14 in the atmosphere today (about .0000765%), is assumed there would be the same amount found in living plants or animals since the plants breath CO2 and animals eat plants. Since sunlight causes the formation of C-14 in the atmosphere, and normal radioactive decay takes it out, there must be a point where the formation rate and the decay rate equalizes. Let me illustrate: If you were trying to fill a barrel with water but there were holes drilled up the side of the barrel, as you filled the barrel it would begin leaking out the holes.At some point you would be putting it in and it would be leaking out at the same rate.You will not be able to fill the barrel past this point of equilibrium.This radioactive carbon 14 slowly decays back into normal, stable nitrogen.Extensive laboratory testing has shown that about half of the C-14 molecules will decay in 5730 years. After another 5730 years half of the remaining C-14 will decay leaving only ¼ of the original C-14. In theory it would never totally disappear, but after about 5 half lives the difference is not measurable with any degree of accuracy.
This is why most people say carbon dating is only good for objects less than 40,000 years old.
Nothing on earth carbon dates in the millions of years, because the scope of carbon dating only extends a few thousand years.
Whenever the worldview of evolution is questioned, this topic always comes up.
Let me first explain how carbon dating works and then show you the assumptions it is based on.
Radiation from the sun strikes the atmosphere of the earth all day long.
This energy converts about 21 pounds of nitrogen into radioactive carbon 14.