E = mc², probably the most famous equation in the entire world. It clarifies the concept of the relationship between mass and energy. It also opens the gateway to the use of nuclear energy in the coming centuries. But do you know who discovered it? It was Albert Einstein.The book I’m going to share to you all is called “Introducing Einstein” written by Joseph Schwartz and Micheal McGuinness and published by Icon Books. I borrowed this book from the school library. Obviously, this book talks about Albert Einstein, the genius who developed the concept of relativity. The theory of relativity introduces the new idea of space and time which was treated separately in Newton’s day. This book also talks about some physical principles derived by other physicists like Galileo, Faraday and Newton in an entertaining way by using funny cartoons and comic scripts.

Through reading this book, we can go through the history of physics and astronomy with some simple and well-known formulae. A little political and biographical history of Einstein is also mentioned. Though Einstein was very success in his scientific field, he still had a regret which affected the whole world , the invention of atomic bomb. As peace if one of the major concerns in his science world, he could not forgive himself of making such a powerful weapon which killed so much people.

Here is an interesting example to illustrate the idea of relativity: Imagine there is a train moving with tremendous speed in front of you. Look at both the front and the back doors of the train at the same time. What do you observe? The door which is nearer to you seems to open first! But why? The doors in fact open simultaneously but why we can see the nearer door open first? Einstein explained that the fast moving object will have a length contraction and concluded that events which occur simultaneously with fast moving object is different when with reference to a stationery object.

Actually, the above example is just a little of relativity. To really understand it, we need to study very hard in order to achieve the fundamental knowledge of physics. However, if you just want to have a brief understanding of relativity, this book is a worth-reading book.