The Order of Time读后感100字

《The Order of Time》是一本由Carlo Rovelli著作，Penguin Publishing Group出版的Hardcover图书，本书定价：$20.00，页数：256，特精心收集的读后感，希望对大家能有帮助。

《The Order of Time》读后感(一)：人类和时间

从《七堂课》到《现实》再到这本《时间的秩序》，罗威利的每一本书都不是简单的科普读物。他更关心的是人类，他想从一个物理学家的角度给予我们内心所需要的慰藉。

本书中，作者将时间之所以有箭头，归因于我们生活在宇宙的特殊一隅。这块区域恰好从有序演化至无序，而唯有这样的过程，才可能诞生出星辰、生命和人类。从这点来看，时间的方向性离不开人类的存在。

本书的最后，作者谈论了记忆、生命、死亡、以及人类认知的极限。在他看来，正是理性之外情感的长啸构成了我们短暂的生命，它让我们意识到时间，它是时间的源泉。

《The Order of Time》读后感(二)：最好的科普书

讀過的最好科普讀物。驚嘆於作者的科学、哲学功力和文筆。

第一部分旨在祛除常识对于时间的认识。相对论证明时间不是统一的，关于“此刻”的迷思也是没有意义的，“此刻”仅仅在此地有其意义，时间也没有独立性，引力场（时空）并不能独立于别的存在。热力学定律似乎证明了时间从过去指向未来的方向性，但这仅仅因为我们的视角太大，太模糊，我们预设了一个低熵点。而当视角聚集在微观层面，若我们清晰所有的粒子运动，原来的低熵特殊点也就不存在，时间的方向性也就失去了。

第二部分，Rovelli阐明了他眼中的世界图景，世界是由事件而非物体构成的，小至粒子，大至整个时空都只是各类事件的互动纠缠，在这个世界里，没有时间，但有变化。

第三部分，Rovelli解释宏观层面的时间是如何产生的。时间是人类的尺度，它有关于我们存在于这个世界的方式、记忆。我们没法避免一个“独特视角”，因此时间的方向总是和熵增方向以致。

因为不是学科学的，不知Rovelli的科研能力，想来应该也很厉害，不然很难想象能用简单几笔就能把过往关于时间的科学勾勒得如此清晰。

Rovelli的哲学功力让人赞叹！仅仅举一个例子。他在一个尾注里用了三五行总结Putnam解读相对论，然后精确指出Putnam错在了哪里。完全点杀！

《The Order of Time》读后感(三)：The order of time

简评：很新的一本关于时间的科普，在图书车无意中翻到，借出来才发现纽约时报 2018 年十佳 nonfiction 之一。感觉比《第一推动丛书》那一系列比较老的书讲得更简洁明了，并且包括了一些物理学的最新的进展，在某种程度上有点点解决了一直以来的一些疑惑：为什么熵是增加的，以及为什么宇宙一开始是低熵的状态。

摘录：

...heat cannot pass from a cold body to a hot one. The crucial point here is the difference from what happens with falling bodies: a ball may fall, but it can also come back up, by rebounding, for instance. Heat cannot.

This is the /only/ basic law of physics that distinguishes the past from the future.

... every configuration is particular, every configuration is singular, if we look at all its details, since every configuration always has something about it that characterizes it in a unique way.

... The notion of “particularity” is born only at the moment we begin to see the universe in a blurred and approximate way. Boltzmann has shown that entropy exists because we describe the world in a blurred fashion. He has demonstrated that entropy is precisely the quantity that counts how many are the different configurations that our blurred vision does not distinguish between.

Our “present” does not extend throughout the universe. It is like a bubble around us. How far does this bubble extend？ It depends on the precision with which we determine time... as humans, we distinguish tenths of a second only with great difficulty; we can easily consider our entire planet to be like a single bubble where we can speak of the present as if it were an instant shared by us all. This is as far as we can go.

Both the sources of blurring — quantum indeterminacy, and the fact that physical systems are composed of zillions of molecules — are at the heart of time. Temporality is profoundly linked to blurring. The blurring is due to the fact that we are ignorant of the microscopic details of the world. The time of physics is, ultimately, the expression of our ignorance of the world. Time is ignorance.

We have shaped an idea of “human being” by interacting with others like ourselves. ... I believe that our notion of self stems from this, not from introspection. When we think of ourselves as persons, I believe we are applying to ourselves the mental circuits that we have developed to engage with our companions.