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No.280　13/01/06 21:10
燻し銀三 ( 50代 ♂ Oe38xe ) あ+あ-

【Measurement of an era with the half-value period 半減期】

《Photosynthesis 光合成 and its suspension》

Therefore,as to the ratio of the C14 in a tree,it's as same as the other C14 in the air as long as the tree is alive.[ｸﾛｰﾊﾞｰ]

Let's suppose the tree was cut down.Then its photosynthesis is over,an a new C14 isn't supplied from the tree.💀

Therefore,the C14 in the tree continues to decrease as the time passes,and when 5370years of the half-value period pass,its C14 becomes a half.🍀

《Measurement of the era》

In short,when comparing the C14's density in the air with other C14 in the wooden sculpture buried under the ground,if the density of the wooden sculpture is as half as the other in the air,the tree was cut down 5370years ago.[ｸﾛｰﾊﾞｰ]

The wooden sculpture made of the tree couldn't be as old as 5370years ago,but this explanation is irrational,for not only the C14 in the tree,but also other in the wooden sculpture continue to decrease.😃

There is the major premise 大前提 in the measurement of the era.😃