Mass Comes from Energy

太極一式而已

2004年物理諾貝爾獎得主Wilczek

在諾貝爾得獎演講中曾笑說

他的老闆曾寫「美國陸軍手冊」
胡弄歐姆定律「可以」分成第一、第二、第三定律。

讓我想起國二知道考前要練習算數學題目起

一直到高中畢業

所有時間都在算數學題目

長大了才發現其實自己就是被「陸軍訓練守則」胡弄

同一個類似的題型題目算n次

說穿了就是一個公式延伸成很多定律而已

不但被騙、還算得很爽

跟時下最夯的手機遊戲沒什麼差別

只差在算功了得

考試時吃香喝辣

一整個世代都把時間浪費在玩手機遊戲

雖然第一式和第二式意義不同

也可以講很多故事

但是老師教學生

學生要舉一反三

不然太極八式搞成128式

多半只能把天才變蠢才

教育的目的更難達成

3.2   Paradigm 2: Mass Comes from Energy

My friend and mentor Sam Treiman liked to relate his experience of how, during World War II, the U.S. Army responded to the challenge of training a large number of radio engineers starting with very different levels of preparation, ranging down to near zero. They designed a crash course for it, which Sam took. In the training manual, the first chapter was devoted to Ohm’s three laws. Ohm’s first law is  V = IR. Ohm’s second law is  I = V/R. I’ll leave it to you to reconstruct Ohm’s third law.

Similarly, as a companion to Einstein’s famous equation  E = mc2 we have his second law,  m =  E/c2. All this isn’t quite as silly as it may seem, because different forms of the same equation can suggest very different things. The usual way of writing the equation,  E = mc2, suggests the possibility of obtaining  large amounts of  energy by converting small amounts of mass. It brings to mind the possibilities of nuclear reactors, or bombs. Stated as  m = E/c2, Einstein’s law suggests the possibility of explaining mass in terms of energy. That is a good thing to do, because in modern physics energy is a more basic concept than mass. Actually, Einstein’s original paper does not contain the equation  E = mc2, but rather  m = E/c2. In fact, the title is a question: “Does the Inertia of a Body Depend Upon its Energy Content?” From the beginning, Einstein was thinking about the origin of mass, not about making bombs.

www.nobelprize.org-wilczek-lecture.pdf