Physics World Book of the Year 2017 Are women more nurturing than men?Are men more promiscuous than women?Are males the naturally dominant sex?And can science give us an impartial answer to these ques
Kung Fu has evolved from a traditional means of defence to become a system of attacking and defending oneself, with or without weapons, exercising the body and maintaining good physical and mental health. As such, these practices have found an international following. Yet what has remained a largely unexplored area is the scientific principles behind these martial arts. This book not only covers the brief history of Chinese martial arts, but also brings together the wisdom of a Kung Fu grand master with a scientist and teacher to explain the scientific reasons why Kung Fu is the powerful practice that it is. Using the principles of physics, biomechanics and biology, with a number of drawings showing some basic postures of Kung Fu, the authors present a deep understanding of how the styles, the specific movements and methods of attack and defence operate.
Newly corrected, this highly acclaimed text is suitable for advanced physics courses. The authors present a very accessible macroscopic view of classical electromagnetics that emphasizes integrating e
黑體輻射研究起源於十九世紀中葉的熱輻射體和輻射標準研究,屬對工業應用需求的響應。從對實驗結果之詮釋——主要是普朗克譜分佈公式——的論證引出了一系列新概念和新物理,包括量子力學、固體量子論、受激輻射、量子統計和玻色-愛因斯坦凝聚等,都是黑體輻射研究的直接結果。此外,這項研究還充實了熱力學,帶來了對光的本性的深入理解。鑒於黑體輻射的超強學術繁殖能力——這一點來自黑體輻射分佈譜公式對模型的不敏感,可以說black-body radiation is the matrix of modern physics (黑體輻射是近代物理之本), 或者說black-body radiation is a goose that lays golden eggs (黑體輻射是一隻會下金蛋的鵝)。關於黑體輻射的實驗研究,除了維恩之外,還有柏林的物理技術研究機構的近代物理實驗五傑。關於黑體輻射的理論研究,先後出場的物理巨擘,據不完全統計,有基爾霍夫、亥爾姆霍茲、斯台藩、玻爾茲曼、維恩、瑞利爵士、普朗克、洛倫茲、愛因斯坦、金斯爵士、艾倫菲斯特、龐加萊、納坦松、德拜、勞厄、泡利、玻色等人,且各有建樹。他們的研究方式之多樣讓人眼花繚亂, 他們的研究手法之嫺熟讓人五體投地,他們的學術功底之深厚讓人歎為觀止。黑體輻射研究是近代物理研究方法的教科書,回顧這段波瀾壯闊的歷史,能讓我們多少學會一些物理研究的真諦。
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