## تابستونه

Another thing that my father told me—and I can’t quite explain it, because it was more an emotion than a telling—was that the ratio of the circumference to the diameter of all circles was always the same, no matter what the size. That didn’t seem to me too unobvious, but the ratio had some marvelous property. That was a wonderful number, a deep number, pi. There was a mystery about this number that I didn’t quite understand as a youth, but this was a great thing, and the result was that I looked for n everywhere.

When I was learning later in school how to make the decimals for fractions, and how to make 3-§-, I wrote 3.125, and thinking I recognized a friend wrote that it equals Jt, the ratio of circumference to diameter of a circle. The teacher corrected it to 3.1416.

I illustrate these things to show an influence. The idea that there is a mystery, that there is a wonder about the number was important to me, not what the number was.

Very much later when I was doing experiments in the labo- ratory-I mean my own home laboratory-fiddling around— no, excuse me, I didn’t do experiments, I never did; I just fiddled around. I made radios and gadgets. I fiddled around. Gradually through books and manuals I began to discover there were formulas applicable to electricity in relating the current and resistance, and so on. One day, looking at the formulas in some book or other, I discovered a formula for the frequency of a resonant circuit which was 2Pi..... where L is the inductance and C the capacitance of the circuit. And there was Pi, and where was the circle? You laugh, but I was very serious then. pi was a thing with circles, and here is Pi coming out of an electric circuit, where [it stood for] the circle. Do you who laughed know how that jt comes about?

I have to love the thing. I have to look for it. I have to think about it. And then I realized, of course, that the coils are made in circles. About a half year later, I found another book which gave the inductance of round coils and square coils, and there were other rc’s in these formulas. I began to think about it again, and I realized that the Pi did not come from the circular coils. I understand it better now; but in my heart I still don’t quite know where that circle is, where that Pi comes from.

کتاب لذت فهمیدن(==؟ the pleasure of finding things out ) برای شروع رسمی تابستون : )

بیش از اندازه دوست دارم این تکه از "علم چیست " فاینمن رو . بی نظیره . همیشه کلاس های فیزیک ذهنم درگیر این چیز ها بود ...

گفتم کلاس فیزیک، چارت درسی می گه این ترم آخری ش بود. استاد هم که دوست داشت پاسم کنه . پس واقعن آخری ش بود .

اگه فکر می کنید تابستون از یک تیر شروع می شه اشتباه می کنید روز بعد تحویل پروژه تابستونه //