Carbon dating half life equation
For example, the image on the right is a simulation of many identical atoms undergoing radioactive decay.Note that after one half-life there are not exactly one-half of the atoms remaining, only approximately, because of the random variation in the process.HALF LIFE IS THE AMOUNT OF TIME IT TAKES FOR ONE HALF OF THE RADIOACTIVE MATERIAL TO DECAY INTO A STABLE FORM.BEFORE DECAY BEGINS, ALL OF THE MATERIAL IS RADIOACTIVEAFTER ONE HALF LIFE, HALF OF THE SAMPLE REMAINS RADIOACTIVE AND THE OTHER HALF IS STABLEAFTER EACH ADDITIONAL HALF LIFE, HALF OF THE REMAINING RADIOACTIVE MATERIAL DECAYSWe use several radioactive isotopes to find the absolute age of events and objects because we know their half life.Instead, the half-life is defined in terms of probability: "Half-life is the time required for exactly half of the entities to decay on average".
For example, if there is just one radioactive atom, and its half-life is one second, there will not be "half of an atom" left after one second.The last figure I heard was that there are currently eight nuclear subs on our ocean floors. It doesn't work for sea creatures and other things that are under water. Then they measure how much is left in the specimen when they find it. It comes from cosmic rays that rain down on the earth (and us) from outer space.Note the consequence of the law of large numbers: with more atoms, the overall decay is more regular and more predictable.A half-life usually describes the decay of discrete entities, such as radioactive atoms.