Lessons from the Book Seven Brief Lessons on Physics

Seven brief lessons on physics
by Carlo Rovelli

   It is a short and quick read book which contains about 80 pages on Kindle Reader. The book briefly explains 7 basic concepts of physics: Einstein’s general theory of relativity, quantum mechanics, the architecture of the cosmos, elementary particles, quantum gravity, the heat of black holes, and humans role. The topics might be difficult to understand well for ordinary people, but the author provides some of the key concepts in simple way.

   The book tries to give a short introduction lesson to each topic. The condensed 10-page stories do not contain all the lessons you want about the subject. If you want to learn more about the concepts of physics, it is better to read other books as well.

Here are my lessons from this book:

• Space is not empty. It is a material component that contains curves and twists. Planets move in curve paths that they can roll. The space and gravitational field are the same.
• Energy is distributed in 'quanta', the discrete unit of energy. In quantum mechanics, objects do not have a specific position, they have some probability to be in a certain position. Their existence can be known when they interact with each other. This interaction also happens randomly, so that the occurrence is unpredictable.
• A galaxy contains a hundred billions of stars and solar systems, a collection of gas, and clouds of dust. Our solar system is one of them. We live in the Milky Way Galaxy. There are billions of galaxies and they expand all sides in a space. The universe contains billions of galaxies. 
• Things around us consist of electrons, quarks, photons, gluons, neutrons, and Higgs basons. They are in motions, the materials in the Universe are in active movement and interaction.
• Heating happens when atoms move more quickly. The heat moves from hot substance to cold one. This flow distinguishes the past and future which represents a time.
  

The book explains basic concept of physics in short messages. I think it is good reference to read and recommend it.