9.29 p.17~

1. 천재는 역시 다르다

While other scientists were making final adjustments to instruments used to measure the yield of the blast, Fermi was making confetti out of a page of notebook paper. As the wind from the initial blast wave began to blow through the camp, he slowly dribbled the confetti into the air, observing how far back it was scattered by the blast (taking the farthest scattered pieces as being the peak of the pressure wave).

17p

2. 1번의 교훈 - 측정은 여러 단계로 이루어진 연속적 사고로 생각할 것.  

The point of this story is not to teach you enough physics to estimate like Fermi (or enough geometry to be like Eratosthenes, either), but that, rather, you should start thinking about measurements as a multistep chain of thought. Inferences can be made from highly indirect observations.

18p

3. 잘 관찰한다는 건 잘 측정하는 것

Technically, a Fermi decomposition is not quite a measurement. It is not based on new observations. 
(As we will see later, this is central to the meaning of the word “measurement.”)

19p

4. 비즈니스적 교훈

 

The lesson for business is to avoid the quagmire that uncertainty is impenetrable and beyond analysis. 

Instead of being overwhelmed by the apparent uncertainty in such a problem, start to ask what things about it you do know. 

As we will see later, assessing what you currently know about a quantity is a very important step for measurement of those things that do not seem as if you can measure them at all.

 

5.