Open strings and closed strings

Superstring theory 4

String theory includes both open strings, which have two distinct endpoints, and closed strings making a complete loop. The two types of string behave in slightly different ways, yielding two different spectra. For example, in most string theories, one of the closed string modes is the graviton, and one of the open string modes is the photon. Because the two ends of an open string can always meet and connect, forming a closed string, there are no string theories without closed strings.

— Wikipedia on String theory

2010.07.19 Monday ACHK

個人大組織 6

馬克吐溫(Mark Twain)曾經講過:「如果你假設世人都是瘋狂的話,你會發現,世間上很多原本不能解釋的事情,都可以解釋到。」

你聽過這一句沒有?

(安:你以前用「即時通訊軟件」(Instant Messaging)傳送過給我。)

是不是「地球表面,是一間精神病院」的那一篇?

這一句不只可以解釋到「很多」現象,而且可以「絕大部分」的現象。所以,我覺得這一句真是威力驚人。

(安:你的意思是,「人是瘋狂的怪獸」這一句,比「人是理性的動物」有更大的解釋力?)

無錯。

(安:「人是理性的動物」都有解釋能力,但是它只能解釋到小部分的現象。而「人是瘋狂的怪獸」卻能解釋到大部分的現象。)

— Me@2010.07.19

相關條目:

地球 2

2010.07.19 Monday (c) All rights reserved by ACHK