对引力的修改理论,下图基本上囊括了主要的一些路线。

图片来源:http://www.cgc-yzu.cn/

While Einstein’s general relativity has been well tested by various observations, it is possible that at the cosmological scale it might require some modification or extension, which could, in turn, explain dark matter or dark energy. There exist a plethora of modified theories of gravity, from simple straightforward generalizations of the Hilbert-Einstein action (e.g. f(R) gravity), to utilizing other geometric structures (e.g. f(T) gravity that models gravity as spacetime torsion instead of curvature), it is important to constrain these theories from both observations and theoretical grounds (a good theory should be mathematically self-consistent and free of pathologies). [Figure source: Tessa Baker]


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.

Youtube播放链接:https://www.youtube.com/watch?v=ewcO6x6FVqY&list=PLPYvFn7exIjttEo-83c9GKT25H-tQBduF

优酷的视频播放列表:

第一学期:

http://v.youku.com/v_show/id_XODA2NDM5OTI=.html?spm=a2hzp.8253876.0.0&f=3226482

第二学期:

http://v.youku.com/v_show/id_XMTIwODMyOTcy.html?spm=a2hzp.8253876.0.0&f=3769855

可视化量子力学源地址:https://www.youtube.com/watch?v=p7bzE1E5PMY

This video visually demonstrates some basic quantum physics concepts using the simple case of a free particle. All the simulations here are based on real equations and laws.
See more information here: http://www.zutopedia.com/quantum_phys…
The mathematics involved was taken from this excellent book: https://www.amazon.com/exec/obidos/AS…