Caltech’s Division of Physics, Mathematics and Astronomy and The Feynman Lectures Website are pleased to present this online edition of

Feynman • Leighton • Sands


Restore my view 1

Now, anyone with internet access and a web browser can enjoy reading2 a high quality up-to-date copy of Feynman’s legendary lectures.

This edition has been designed for ease of reading on devices of any size or shape; text, figures and equations can all be zoomed without degradation.3

Volume I

mainly mechanics, radiation, and heat

Volume II

mainly electromagnetism and matter

Volume III

quantum mechanics

For comments or questions about this edition please contact Michael Gottlieb.

Making Sense of Quantum Mechanics —— A much needed book by a leading figure in quantum foundations

读书+物理学:Making Sense of Quantum Mechanics(pdf)

这本书的电子版售价为41,64 € ,但是可以根据其DOI号下载到免费版,DOI号是 10.1007/978-3-319-25889-8

Science Hub 搜索后的链接是:




读书:Carlo Rovelli出了一本新书《The Order of Time》
The Order of Time -by Carlo Rovelli(第一种封面)
The Order of Time -by Carlo Rovelli(第二种封面)


关于这本书有一个短视频,是Carlo Rovelli讲解时间为什么不存在。

视频:Carlo Rovelli explains that time doesn’t really exist(点击查看原视频



由本尼迪克特·康伯巴奇(Benedict Cumberbatch)(卷福)朗读的音频版:


这本书是一本科普书,但它的第六章揭示了一个新科学—— Quantum Graphity (量子引力图论)。

这是arXiv上的一篇介绍Quantum Graphity的论文。





此论文标题:The existence of a minimum wavelength for photons


The holographic property of entropy plays a key role in the thermodynamic description of gravita-
tional field equations. It remains unclear, we argue, whether this property is necessarily interwoven
with gravity itself or can be understood instead as a manifestation of physics outside gravity.
It is pointed out that if the latter is the case, so that the holographic property of entropy could be
considered as completely rooted on some microscopic, non-gravitational, intrinsic property of matter,
gravity could merely be understood as the necessary macroscopic manifestation of this microscopic
property of matter, being simply the expression of the thermodynamic conservation of energy. A
quite peculiar status of Einstein’s gravity in this context (as compared to generalized metric theories
of gravity) is apparent. A successful microscopic property of matter, is found to necessarily mean in
particular the existence of an absolute minimum wavelength for photons, of orders of Planck length.