注目の話題: 妊娠中から旦那が無理になった; 私はどうでもいい女？; 35歳以上は無理なのですか？

Let's enjoy English!

No.448　13/05/18 09:55
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【Let's measure an age with the half-life】

《Measurement of the age》

However,the explanation is unreasonable,for it's not only the isotope of carbon,C14,in the wood which continues to decrease.☝

The C14 in the air must also have kept on decreasing.😃

There is the major premise 大前提 in relation to the measurement of the age.It's that density of the C14 in the air is unchangeable.It has been guaranteed.😃

It's the reaction of the atomic nucleus by cosmic rays,or being done underground.The chemical reaction supplements the C14 in the air one after another,therefore the density of the C14 in the air has been constant.😃

Oh!The major premise has suddenly appeared.I hate to say,but I can't always understamd the explanation.Without detailed more explanations,its author makes us understamd the theory,I'm wondering.😚

If continue to study,I may be able to make it out some day,though I hope to figure it out when I'm alive.😂