1. Atomic energy: Atomic energy, also known as nuclear energy, refers to the energy released when the nucleus changes, such as the huge energy released during heavy nuclear fission and light nuclear fusion. The discovery and application of atomic energy completely changed the energy industry and the field of science and technology, and had a far-reaching impact on the development of the world.
2. Semiconductors: Semiconductors refer to materials with conductivity between conductors and insulators at room temperature. The development of semiconductors has promoted the rapid progress of electronic technology and made it possible to manufacture computers, communication equipment and various electronic products. Semiconductor technology is widely used and plays an important role in promoting the development of modern society.
3. Computer: Computer is one of the most advanced scientific and technological inventions in the 20th century, which has an important impact on human production and social activities. The appearance of computer makes information processing and storage more efficient and convenient, and promotes the progress in scientific research, industrial production, commercial operation and other fields.
4. Laser: A laser is a device that can emit laser light. The invention and application of laser play an important role in medical treatment, communication, manufacturing and other fields. The high focus and high energy density of laser have broad application prospects in cutting, welding, ranging and medical treatment, and play an important role in promoting the development of modern science and technology.