Einstein was one of the most famous scientists of the 20th century. His theory of relativity and quantum mechanics had a profound impact on modern physics. Here are three of Einstein's shocking predictions: The speed of light is the fastest speed in the universe: Einstein proposed the special theory of relativity in 1905. The most famous of which is that he proposed that the speed of light is the fastest speed in the universe. This theory shows that when objects move at high speed, time and space will change, which is called the time expansion effect. This theory was later proven wrong, but Einstein's predictions still had a profound impact on scientists 'understanding of the way the universe works. Photons are quantum: In 1915, Einstein proposed the concept of photon, which is a new quantum concept. Photons were fundamental particles responsible for transmitting light waves and were an important source of electromagnetic waves. The discovery of this theory had a profound impact on the development of quantum mechanics and provided the foundation for modern optical communication. Black holes will devour anything that comes close to them: Einstein proposed the general theory of relativity in 1916, the most famous of which is his concept of black holes. Black holes are extremely dense objects, and their gravity is so strong that anything that comes close to them will be swallowed up. The discovery of this theory showed that black holes were a very special phenomenon, and their gravitational field was so strong that even light could not escape. The discovery of this theory had a profound impact on the understanding of celestial bodies and gravitational fields in the universe.