Carbon isotope used radiocarbon dating does work
The actual measurement of the ratio is quite accurate. If someone told you that they have Carbon dated a sample to October 13, 1492, your BS detector should immediately start flashing.
Carbon dating is an excellent tool, along with many others, to determine age and chronology.
Animals eat plants, and incorporate the Carbon into their cells. So the ratio should be similar throughout the food chain.
But, since C-14 is primarily created in the atmosphere by the interaction of cosmic rays with Nitrogen, the actual fluctuation of cosmic ray intensity can alter the natural abundance.
An isotope is an element with the same “atomic number” (number of protons) , but a different “atomic weight” ( protons neutrons electrons.) Some isotopes are stable, which means they don't change over time ( well…
Regular Carbon, C-12 is the most common isotope of Carbon.
relatively long times, as in millions or billions of years)Most common Isotopes of Carbon Carbon- C-126- Neutrons6- Protons Natural abundance- 98.93%Half life- Stable Mass- 12u Carbon- C-137- Neutrons6- Protons Natural abundance- 1.109%Half life- Stable Mass- 13.003355 u Radiocarbon, C-148- Neutrons6- Protons Natural abundance- 1 part per trillion Half life- 5,730 ± 40 years Mass- 14.00324u____________________OK. We take Carbon from a sample of biological material, and measure the ratio of stable Carbon to unstable Radiocarbon, essentially C-12 to C-14.
So maybe that is more information than you wanted, but it's important to be aware of. Since C-14 has a half life of about 5,700 years, and we know the normal ratio in fresh biological material, we have a “clock” to measure the age of the sample. This is where it gets a bit fuzzy…Yes, it's reliable, within certain constraints.
Also note, you cannot Carbon date glass, metal, or pottery. You could perhaps find a bit of leftover plant material from the crock, wine residue from the bottle, or blood on the knife.The older the material, the less C-14 it will contain, as the C-14 will have decayed over time at a fairly regular rate. C-12 to C-14 ratios are somewhat variable in normal samples.Plants take up Carbon as both isotopes, and incorporate that Carbon into their cells.They want to know if it is accurate or if it works at all.Worse still, sometimes they want to know how evolutionists use Carbon-14 to date dinosaur fossils!