Beyond this, scientists have now used a "time machine" to prove that the half-lives of radioactive species were the same Dating Speed? Dating Montreal of years ago.
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This time machine does not allow people to actually go back in time, but it does allow scientists to observe ancient events from a long way away. Lutetium—hafnium dating - Wikipedia The time machine is called the telescope. Because God's universe is so large, images from distant events take a long time to get to us.
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Telescopes allow us to see supernovae exploding stars at distances so vast that the pictures take hundreds of thousands to millions of years to arrive at the Earth. So the events we see today actually occurred hundreds of thousands to millions of years ago.
And what do we see when we look back in time? Much of the light following a supernova blast is powered by newly created radioactive parents. So we observe radiometric decay in the supernova light.
The half-lives of decays occurring hundreds of thousands of years ago are thus carefully recorded! These half-lives completely agree with the half-lives measured from decays occurring today.
We must conclude that all evidence points towards unchanging radioactive half-lives. Some individuals have suggested that the speed of light must have been different in the past, and that the starlight has not really taken so long to reach us.
However, the astronomical evidence mentioned above also suggests that the speed of light has not changed, or else we would see a significant apparent change in the half-lives of these ancient radioactive decays. Some doubters have tried to dismiss geologic dating with a sleight of hand by saying that no rocks are completely closed systems that is, that no rocks are so isolated from their surroundings that they have not lost or gained some of the isotopes used for dating.
Speaking from an extreme technical viewpoint this might be true--perhaps 1 atom out of 1, of a certain isotope has leaked out of nearly all rocks, but such a change would make an immeasurably small change in the result. The real question to ask is, "is the rock sufficiently close to a closed system that the Dating Speed?
Dating Montreal will be same as a really closed system? These books detail experiments Dating Speed? Dating Montreal, for a given dating system, which minerals work all of the time, which minerals work under some certain conditions, and which minerals are likely Dating Speed?
Dating Montreal lose atoms and give incorrect results. Understanding these conditions is part of the science of geology.
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Geologists are careful to use the most reliable methods whenever possible, and as discussed above, to test for agreement between different methods. Some people have tried to defend a young Earth position by saying that the half-lives of radionuclides can in fact be changed, and that this can be done by certain little-understood particles such as neutrinos, muons, or cosmic rays.
This is stretching it. While certain particles can cause nuclear changes, they do not change the half-lives.
The nuclear changes are well understood and are nearly always very minor in rocks. In fact the main nuclear changes in rocks are the very radioactive decays we are talking about. There are only three quite technical instances where a half-life changes, and these do not affect the dating methods we have discussed.
Only one technical exception occurs under terrestrial conditions, and this is not for an isotope used for dating.
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According to theory, electron-capture is the most likely type of decay to show changes with pressure or chemical combination, and this should be most pronounced for very light elements. The artificially-produced isotope, beryllium-7 has been shown to change by up to 1. Significance In another experiment, a half-life change of a small fraction of a percent was detected when beryllium-7 was subjected toatmospheres of pressure, equivalent Dating Speed?
Dating Montreal depths greater than miles inside the Earth Science, All known rocks, with the possible exception of diamonds, are from much shallower depths. In fact, beryllium-7 is not used for dating rocks, as it has a half-life of only 54 days, and heavier atoms are even less subject to these minute changes, so Dating Speed?
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Dating Montreal dates of rocks made by electron-capture decays would only be off by at most a few hundredths of a percent. Physical conditions at the center of stars or for cosmic rays differ very greatly from anything experienced in rocks on or in the Earth.
Yet, self-proclaimed "experts" often confuse these conditions. Cosmic rays are very, very high-energy atomic nuclei flying through space.
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The electron-capture decay mentioned above does not take place in cosmic rays until they slow down. This is because the fast-moving cosmic ray nuclei do not have electrons surrounding them, which are necessary for this form of decay. Another case is material inside of stars, which is in a plasma state where electrons are not bound to atoms.
In the extremely hot stellar environment, a completely different kind of decay can occur. This has been observed for dysprosium and rhenium under very specialized conditions simulating the interior of stars Phys. All normal matter, such as everything on Earth, the Moon, meteorites, etc.
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Lutetium—hafnium dating is a geochronological dating method utilizing the radioactive decay system of lutetium— to hafnium— With a commonly accepted. Aug 1, Lutetium is the heaviest of the rare-earth elements REEs and shares Hafnium is the next higher element from Lu on the periodic table Z ¼.
As an example of incorrect application of these conditions to dating, one young-Earth proponent suggested that God used plasma conditions when He created the Earth a few thousand years ago.
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This writer suggested that the rapid decay rate of rhenium under extreme plasma conditions might explain why rocks give very old ages instead of a young-Earth age. This writer neglected a number of things, including: More importantly, b rocks and hot gaseous plasmas are completely incompatible forms of matter!
The material would have to revert back from the plasma state before it could form rocks. In such a scenario, as the rocks cooled Caut o femeie in Canada pentru casatorie hardened, their ages would be completely reset to zero as described in previous sections.
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