The Elegant Universe By Brican Greene

The Elegant Universe Impression

The book “The Elegant Universe written by Brican Greene explains the theory of everything when Einstein combines people’s different ideas into one and that's how he becomes a genius. The book talks about the basic of string theory and how it works. In the past, many scientist believes the theory was nothing but a foolish idea and not many people know about this theory. This is how the story began with how Einstein discovered the string theory and why people calls him a genius. In 1687, Newton published his law of gravity, he declares that the moon revolves around the Earth force and force Apple to fall from the tree is the same kind of force. In accordance with Newton's point of view, the moon rotates around

Until the early 20th century, Newton’s theory have always been correct and physics was unable to argue his theory. However, Einstein's special theory of relativity is the biggest obstacle. An important feature of special relativity is the absolute speed of light defined. That is nothing faster than light. Imagine if the sun suddenly disappeared, then the Earth lost its gravitational pull of the sun, it will immediately fly track, which is Newton's point of view. But even if the sun disappears, because the sun's light will be 150 million kilometers away from the huge to eight minutes will disappear.Therefore, how gravity can disappear before the light? Of course, before the emergence of special relativity, Newton's theory of gravity also has a significant flaw, it highly accurate predictions of objects under the action of gravity on how sport, but was not able to explain what gravity

Disregarding gravity, there is such a phenomenon. Let's say if you are in a closed elevator, arrived in 100 floor and it's suddenly starts falling down. You we not realized the gravity of the earth because the closed elevator because a space. Another phenomenon will be when you sit on the car, the car suddenly accelerated and you will feel the effects of acceleration on you. It is accelerated upward, even without the Earth you can feel, similar strong role, that acceleration feel the force generated, the feeling generated by the gravitational force are indistinguishable. We study the acceleration of a special motion, circular motion. Assuming a circular turntable, you're going to measure the perimeter of it, so you can lie on the edge of the disk measurement, since the disk is rotating, you have a speed, your hands ruler will be shortened slightly due to movement, when you go to measure the diameter of the turntable, and the circumference divided by the diameter, you will find getting a larger number than 2π. Strange thing appears and could not be explained by the ancient laws. Base on what we’ve learned, the radio of a round object should always be 2π and this phenomenon lead us to another unsolved