Professor vs. student: Discussion on God

[yazdi]

Re: Professor vs. student: Discussion on God

@ajazali

well, this is what they selected, why didnt they select 144 atoms instead of 133?
this is how they defined a unit of second, what is logic behind selecting this specific length?

Caesium 133 is a radioactive isotope of the element caesium having a specific half life. It does not correspond to 133 number of Caesium atoms. Please go and study atomic watches and try to understand the concept. This half life fact of radioactive isotope is very specific and exactly measurable. There are no assumptions involved here.