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How Far Back Can Carbon Dating Be Accurate

Accurate Carbon Can Dating Be How Back Far
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DESCRIPTION: For an example, when they tried to get the carbon dating for presence of Aboriginal people in Australia they get to the number 40, But it could be much earlier. Why is that 40, years limit for carbon dating methods?

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How Accurate is Carbon Dating?

C (the period of time after which half of a given sample will have decayed) is about 5, years, the oldest dates that can be reliably measured by this process date to around 50, years ago, although special preparation methods occasionally permit accurate analysis of older samples. The idea behind radiocarbon dating. 20 May At least to the uninitiated, carbon dating is generally assumed to be a sure-fire way to predict the age of any organism that once lived on our planet. Click to read more How Many Cities Have Free Public Transport? How Does Norway Help Oil Companies? Does the Flu Have a Lasting Effect? Is Europe. 18 Oct Climate records from a Japanese lake are providing a more accurate timeline for dating objects as far back as 50, years By measuring the ratio of the radio isotope to non-radioactive carbon, the amount of carbon decay can be worked out, thereby giving an age for the specimen in question.

Welcome to the Ars OpenForum. Posting Guidelines Contact Moderators. Carbon dating, rate of decay, how far can we go? Fri Apr How Far Back Can Carbon Dating Be Accurate, 5: How far can you go back in time, and assume an accurate sample with carbon dating?

It seems limited, how can an observer know the state of the decay of a certain molecular structure evencalendar years ago? Could there be other influences that would affect the rate of decay of carbon 14?

If it has generally been established as a constant, at what point does the "constant" break down? The constant, that is the Strong Nuclear Force, is absolute. It'd have to be, it's what controls radioactivity and all other nuclear reactions. If we surmise that the Strong Nuclear Force can change, then we have to explain why the Sun is still there. A bit in one way, the rate of fusion goes through the roof and the Sun blows itself apart. A bit in How Far Back Can Carbon Dating Be Accurate other, the rate of fusion drops and the Sun collapses.

Where "A bit" is a few parts How Far Back Can Carbon Dating Be Accurate a trillion or less, most likely very much less. Carbon has a half-life of 5, years so decays fairly quickly to unusable proportions. We also need to calibrate how much carbon it had to begin with. To do that we need records of how much was being made from nitrogen. To do that we need samples of atmospheric gas, from ice cores or solar activity from tree rings, etc.

If we're a bit depleted in nitrogen, then we know it's become carbon We can get reasonable accuracy to 50, years, better accuracy more recently. This calibration is what limits the accuracy because we know that with a given amount of carbon, it absolutely will decay at a very tightly controlled rate.

Fri Apr 25, 7: Fri Apr 25, Originally posted by spoof: Unfortunately, I was not able to attend that event, due to prior schedule conflicts. Originally posted by Hat Monster: Originally posted by Chuckles: Science cannot tell time. It can set a frame, or a parameter for the occurence of one event or another, but it has only the most recent reference for the age of any matter whatsoever. We have only arbitrary concepts of the age of matter as we know it.

Sat Apr 26, 5: Ars Legatus Legionis et Subscriptor. Sat Apr 26, 9: Originally posted by UserJoe: Sat Apr 26, 2: That's right, it's the weak force that governs beta decay. My error, but doesn't detract from the post's content. Now, on to the next question, who held the stop watch at the Big Bang? Sat Apr 26, 4: Sat Apr 26, 6: The technique for carbon dating is being refined to the point it is believed that reasonable accuracy may be achieved back toyears ago. Carbon dating works, btw, by comparing the ratio of C 14 to C The further back you go, the harder it gets to discern that difference accurately.

Now, I'm interested to know what other radio-isotopes we can use to date old stuff. Like old rocks, for instance. Ars Tribunus Angusticlavius et Subscriptor. Isotopic systems that have been How Far Back Can Carbon Dating Be Accurate for radiometric dating have half-lives ranging only about 10 years e.

Sun Apr 27, Sun Apr 27, 5: I'm not pushing some creationist angle here, they just like to pick nice "round" numbers. No, I'll take scientific observations any day of the week, it's just that so much of science must, as a discipline, base their observations on the painstaking recording of observable physical data.

When no observer is present, can we comfortably assume anything about the physical state of the universe at a time when no recorded physical data is available? To merely observe the physics of atomic structures in the "here and now" and then state that "it's always been like this", seems somewhat presumptive. Sun Apr 27, 8: Originally posted by zeotherm: Sun Apr 27, 9: Originally posted by BuckG: I find ranty non-scientific curt dismissals of theories with this sort of attitude half baked and highly aggravating.

It's like a little kid turning their nose up their parent cause they think they know better. Therefore, I am actually considering more than you are, which makes me better than you mere "scientists". I don't care if I have no idea how you could be wrong, I am smarter merely by suggesting you are mistaken. Can the Weak Force within an atom be effected? Are half-life constants truely constant? Sun Apr 27, 1: If the basic constants of the universe weren't, in fact, constant, we'd observe effects out there in deep space or maybe not so deep space that would be inexplicable.

Mon Apr 28, 7: Mon Apr 28, 1: Originally posted by ZeroZanzibar: Yet, the astrophysicists who examine all of this stuff tell us the same laws of physics applies everywhere and therefore every when they look. The weak force has not changed during the history of the solar system.

Mon Apr 28, 2: If they were, we wouldn't have had photons. We do have photons, hence they were not. Mon Apr 28, 3: Originally posted by bantha: Tue Apr 29, 5: What if the change itself also propagates at the speed of light? The change could be trailing or preceding our ability to detect it in every case, due to the very same reason we are able to "look into the past" in the first place.

Tue Apr 29, 9: I suppose this is only tangentially related, but it's a question I've been thinking about for a while now, and I don't think it's worth its own thread.

Tue Apr 29, I think the place to look for evidence for that the cosmic background radiation is differentiated in some way. But, while space is largely empty, not all of it is. There's patches where it isn't so empty, just by sheer chance and volume of the universe. I think you also need to play Einstein and create some equations. While they are hard to detect precisely because they are so energetic, cosmic rays that come through the sun versus from outside the solar system that is, a place where no planets are, especially Jupiter should show, on whatever equations you posit, some sort of difference.

Or, if that creates problems due to the known issues around photons and gravity, some other near-solar incident angle that's far enough away to create the problem in an easily measured way.

Versus, of course, nowhere near the sun. Maybe X Rays or other wavelengths would work as well. Gravitational lenses may be useful here although in this case, it would be measuring only "half" of the lensing versus something a bit "farther to the left".

I suspect we'd know about it if that sort of thing was true. Astronomers do look in pretty much every direction and pretty much every wavelength we can even occasionally detect.

Unless everyone was asleep How Far Back Can Carbon Dating Be Accurate, I suppose -- we don't always look for what we don't expectthen there'd already be people talking about the problem, perhaps trying to attribute it to gravity which is an issue, even for photons or something of the sort. Tue Apr 29, 1: Originally posted by Control Group: Tue Apr 29, 3: Tue Apr 29, 4: Wed Apr 30, They've just announced a big improvement in the precision of argon-argon dating.

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Can you ever be "just friends"?? 28 Aug For your situation, all that is known is the half-life of carbon To continue further, carbon daters find the ratio between carbon and carbon (which does not decay) to find N and N 0. Their methods of finding the ratio is extremely accurate, so unless Δ t is under 20 years, I suspect radiocarbon dating. 18 Oct Climate records from a Japanese lake are providing a more accurate timeline for dating objects as far back as 50, years By measuring the ratio of the radio isotope to non-radioactive carbon, the amount of carbon decay can be worked out, thereby giving an age for the specimen in question..

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We use cookies to provide you with a better onsite experience. By continuing to browse the site you are agreeing to our use of cookies in accordance with our Cookie Policy. The carbon clock is getting reset.

Climate records from a Japanese lake are set to improve the accuracy of the dating technique, which could help to shed light on archaeological mysteries such as why Neanderthals became extinct.

Carbon dating is used to work out the age of organic material — in effect, any living thing. The technique hinges on carbon, a radioactive isotope of the element that, unlike other more stable forms of carbon, decays away at a steady rate. Organisms capture a certain amount of carbon from the atmosphere when they are alive. By measuring the ratio of the radio isotope to non-radioactive carbon, the amount of carbon decay can be worked out, thereby giving an age for the specimen in question.

But that assumes that the amount of carbon in the atmosphere was constant — any variation would speed up or slow down the clock. The clock was initially calibrated by dating objects of known age such as Egyptian mummies and bread from Pompeii; work that won Willard Libby the Nobel Prize in Chemistry.

Welcome to the Ars OpenForum. Posting Guidelines Contact Moderators. Carbon dating, rate of decay, how far can we go? Fri Apr 25, 5: How far can you go back in time, and assume an accurate sample with carbon dating? It seems limited, how can an observer know the state of the decay of a certain molecular structure even , calendar years ago?

Could there be other influences that would affect the rate of decay of carbon 14? If it has generally been established as a constant, at what point does the "constant" break down? The constant, that is the Strong Nuclear Force, is absolute. It'd have to be, it's what controls radioactivity and all other nuclear reactions. If we surmise that the Strong Nuclear Force can change, then we have to explain why the Sun is still there.

Looks like you are using an old version of Internet Explorer - Want update your browser. Proviso you already have an account, Sign in. Scientists use a technique commanded radiometric dating to cost the ages of rocks, fossils, and the world. Many people have d�mod� led to believe so as to radiometric dating methods possess proved the earth en route for be billions of years old.

With our sweat on one particular custom of radiometric dating—carbon dating—we will see that carbon dating strongly supports a young earth. Note to facilitate, contrary to a notorious misconception, carbon dating is not used to time rocks at millions of years old.

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18 Oct Climate records from a Japanese lake are providing a more accurate timeline for dating objects as far back as 50, years By measuring the ratio of the radio isotope to non-radioactive carbon, the amount of carbon decay can be worked out, thereby giving an age for the specimen in question. So by measuring the C level we work out how many half lives old the sample is and therefore how old it is. The trouble is that after 40, years there is under 1% of the original C left, and it becomes too hard to measure it accurately. This isn't a fundamental limit as more accurate measurements could go further back. 28 Aug For your situation, all that is known is the half-life of carbon To continue further, carbon daters find the ratio between carbon and carbon (which does not decay) to find N and N 0. Their methods of finding the ratio is extremely accurate, so unless Δ t is under 20 years, I suspect radiocarbon dating.

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