The first half of the last century can be said to be the most brilliant period in the history of physics. Quantum mechanics and relativity were born, killing classical physics on the beach. With the birth of new theory, a large number of new technology applications have been developed. Science has always been a double-edged sword, which can be used to benefit and destroy mankind. During World War II, Germany attacked everywhere and dragged the whole of Europe into the war. Under the blitzkrieg attack of Germany, the Czech Republic, Poland, France and other European countries fell one after another, and the whole of Europe was in jeopardy. However, the eastward Germany suffered setbacks in Russia, and the situation began to come to an impasse. ▲ Hitler's military parade In this case, the German leadership worked harder to make weapons of mass destruction and change this embarrassing situation. Among them, nuclear weapons are regarded as a very promising direction. At this time, Germany is also full of talents, and there are many famous physicists. Heisenberg, Raul, Porter, Geiger ... An expert group to develop atomic bombs was soon established, with Heisenberg as the leader, who was regarded as one of the greatest physicists in the 20th century. ▲ Heisenberg Heisenberg team quickly invested in research and development. A few months later, they gave a report: at this stage, it is impossible to build an atomic bomb. Because according to the calculation results, it takes several tons of uranium 235 to make an atomic bomb, and according to the industrial refining level in the world at that time, it is impossible to extract several tons of uranium 235. Because raw materials can't be made in sufficient quantities, finished products are impossible. The Heisenberg Group submitted this report to the Nazi German military. After reading the report, the military also thought that it was impossible to build an atomic bomb, so it turned its attention to other weapons manufacturing directions. However, the military gave the Heisenberg team some money to continue their research. In case one day, the industrial refining level goes up and several tons of uranium-235 can be synthesized, then this atomic bomb will not be caused. ▲ Uranium Mine We know that the world's first atomic bomb was developed by the United States. Germany began to develop atomic bombs from 1939. 1in June, 942, the United States also launched the Manhattan project and began to organize people to develop atomic bombs. Unexpectedly, in less than three years, the world's first atomic bomb exploded successfully in the United States. The bombing also shocked Heisenberg. How did the Americans get the atomic bomb out? Heisenberg began to check himself, but he didn't do it well in the end. I don't know if he didn't check it. He was shocked when he checked. It turned out that a mathematical formula was miscalculated in that year, which led to an error in the measurement of uranium 235. To build an atomic bomb, you don't need a few tons of uranium -235 at all, just a few kilograms. ▲ Heisenberg, the internal structure of the atomic bomb, was the authority of physics at that time. When he gave that conclusion, no one questioned it. Heisenberg himself was convinced of this calculation result, but he didn't expect to dig a big hole for the Germans. However, many people think it is a good thing that Heisenberg's math problem is wrong. If it is right, with the industrial level and talent strength of Germany at that time, it is entirely possible to build an atomic bomb. Then the whole situation of World War II will be a different situation, which is terrible. There are also some people who think that Heisenberg deliberately miscalculated in order to prevent the Germans from possessing the atomic bomb, otherwise I don't know how many lives will be destroyed.