# Physics and Love 1

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Dear Mrs. Chown,

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Ignore your son’s attempts to teach you physics.

Physics isn’t the most important thing.

Love is.

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Best wishes,
Richard Feynman

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2008.12.31 Wednesday $ACHK$

# Error

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2008.12.31 Wednesday $copyright ACHK$

# Beauty 2

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To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature … If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in.

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— The Character of Physical Law (1965) Ch. 2, by Richard Feynman

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2008.12.31 Wednesday $ACHK$

# 動感翻譯 2

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The Elegant Universe, by Brian Greene

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2008.12.30 Tuesday $copyright ACHK$

# 出家

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— Me

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2008.12.30 Tuesday $copyright ACHK$

# The price of being professional

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Q: How long should I be devoted to quantum mechanics?

A: One night or one life.

Now, you could either choose to drop the course, or stay and suffer to enjoy the devil in the details (the price of being professional).

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— RB

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2008.12.29 Monday $ACHK$

# 苦悶 | 耐性

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Climate is what you expect, weather is what you get.

— Robert A. Heinlein

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2008.12.28 Sunday $ACHK$

# 講粗口

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–Me

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2008.12.27 Saturday $copyright ACHK$

# Professor

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But now that we’ve come this far, being a professor (which means having the habit of not being able to stop talking at the right time), I cannot resist telling you something about the rest of physics.

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— p.130 Feynman’s QED: the strange theory of light and matter

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2008.12.26 Friday $ACHK$

# Chess

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[Chess] is a foolish expedient for making idle people believe they are doing something very clever, when they are only wasting their time.

— George Bernard Shaw

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2008.12.26 Friday $ACHK$

# 情緒病

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It is a profoundly erroneous truism, repeated by all copy-books and by eminent people when they are making speeches, that we should cultivate the habit of thinking of what we are doing.

The precise opposite is the case.

Civilization advances by extending the number of important operations which we can perform without thinking about them. Operations of thought are like cavalry charges in a battle–they are strictly limited in number, they require fresh horses, and must only be made at decisive moments.

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— Translation by Me

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2008.12.25 Thursday $copyright ACHK$

# 黎明

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— 黎明

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2008.12.23 Tuesday $ACHK$

# Beauty

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Everything sufficiently beautiful is connected to all other beautiful things! Follow the beauty and you will learn all the coolest stuff.

— John Baez
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2008.12.22 Monday $ACHK$

# Rejection 2

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Weakness of attitude becomes weakness of character.

— Einstein

— Translation by Me

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2008.12.21 Sunday $copyright ACHK$

# Duality

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Particles are localized bundles of energy and momentum.

A wave, in contrast, is a disturbance spread over spave.

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— p.107 Principles of Quantum Mechanics, by R. Shankar

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2008.12.20 Saturday $ACHK$

# Painting 2

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…, knowing it is the light that is driving me. I used to think I was the artist when I was painting. I now see, since my NDE, that I am only the brush, my life experiences are the paint, my life is the painting, and the world is the studio with love as the subject.

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— p.48 Lesson from the Light, by Kenneth Ring

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2008.12.19 Friday $ACHK$

# Wheeler’s First Moral Principle

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Never make a calculation until you know the answer.

Make an estimate before every calculation, try a simple physical argument (symmetry! invariance! conservation!) before every derivation, guess the answer to every puzzle.

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— Spacetime Physics: Introduction to Special Relativity, by John Wheeler

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2001.01.21 Thursday $ACHK$

# Force and Power

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Force $=$ space rate of change of Energy

$F = \frac{dE}{ds}$

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Power $=$ time rate of change of Energy

$P = \frac{dE}{dt}$

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–Me @ 2000.09.15

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2008.12.17 Wednesday $\copyright ACHK$