标签:莫非定律 相关文章
分集介绍:本视频是关于物理光学课程的。课中主要讲解了光学中光偏相关内容,证明了光穿过不同介质的偏振角存在。通过例子分析和实验来阐述所讲知识。
物理学家Geoffrey West发现,简单的数学定律治理着城市的各种属性--财富,犯罪率,步行速度以及城市的其它方方面面都可由一个数字推算出来:即城市的人口。他通过展示其中的原理,阐述
分集介绍:这堂课主要讲述了多普勒频移效应以及它的测量和运用。多普勒频移效应分为红移和蓝移,红移用于短波,蓝移用于长波。然后教授举了两个多普勒频移的例子,一是黑洞双星的发
Although the price of a bowl of Lanzhou noodles has soared to over 10 yuan in restaurants, you can still get a bowl for 4.5 yuan at college canteens. 尽管饭馆里的兰州拉面已经飞涨到了每碗10块钱以上,但在大学食堂你仍然可以
By Ernest Leong Washington 15 April 2008 The push to become more environmentally friendly is gaining momentum in the Washington area. The first all-hybrid taxicab fleet in the U.S. recently opened for business just outside the nation's capital. VOA's
This is counter to all expectations. It appears that the universe may not only be filled with dark matter, but with dark energy. Scientists sometimes also call it vacuum energy or, more exotically, quintessence. Whatever it is, it seems to be driving