1. Smoke detector: Smoke detector uses the energy released by radioactive substance americium -24 1 to generate a small charged particle band. In the event of an accident, the smoke generated by the flame will react with the particle beam and trigger the alarm to sound automatically.

2. Smooth road: In Einstein's doctoral thesis, a new method of measuring molecules in different solutions was discussed, which later became the basic method of colloid chemistry. Building materials engineers used Einstein's research results when building roads.

3. Solar cells: Einstein correctly analyzed this conversion principle for the first time in a paper published 90 years ago. His achievement found that photons have energy. Some photons carry enough energy to overcome the "stickiness" of concentrating electrons on a metal. This is the famous photoelectric effect.

4. Digital camera: Einstein used Brownian motion to create a statistical method to link microscopic quantities with macroscopic quantities, which is still the matching law that pharmacists all over the world must follow today.

5. Computer monitor?

When you come to the office, you turn on the computer and start working. In a short moment, electrons are being emitted from the cathode of the picture tube, as if gaining energy in the process of acceleration and accumulating on the display screen, which is just in line with Einstein's special theory of relativity. The engineer who invented the computer display must make the display conform to the "relativistic effect", otherwise the magnet that controls the electronic flight will produce blurred images on the display screen, which will make you unable to work, and of course, wonderful computer games will not be played.

5, the establishment of the special theory of relativity:

As early as 16 years old, Einstein learned from books that light is a very fast electromagnetic wave. He has an idea. If a person moves at the speed of light, what kind of world scene will he see? He will not see the advancing light, but only the electromagnetic field that oscillates in space but stagnates. Is this possible?

In connection with this, he would like to discuss the so-called ether problem related to light waves. The word ether comes from Greece and is used to represent the basic elements that make up objects in the sky. /kloc-Descartes introduced it into science for the first time in the 0/7th century as a medium for spreading light. Later, Huygens further developed the theory of ether, thinking that the medium carrying light waves is ether, which should fill all spaces including vacuum and penetrate into ordinary matter. Unlike Huygens, Newton put forward the particle theory of light. Newton believed that the luminous body emitted a stream of particles moving in a straight line, and the impact of the particle stream on the retina caused vision. Newton's particle theory prevailed in18th century, but the wave theory prevailed in19th century, and the theory of ether developed greatly. At that time, the view was that the propagation of waves depended on the medium, because light can propagate in a vacuum, and the medium that propagates light waves is the ether that fills the whole space, also called optical ether. At the same time, electromagnetism has developed vigorously. With the efforts of Maxwell, Hertz and others, a mature electromagnetic phenomena's dynamic theory-electrodynamics was formed, which unified light and electromagnetic phenomena in theory and practice, and regarded light as electromagnetic waves in a certain frequency range, thus unifying the wave theory of light and electromagnetic theory. Ether is not only the carrier of light waves, but also the carrier of electromagnetic fields.

: Albert. Einstein (1March 87914-1April 955 18) was born in Ulm, Wü rttemberg, Germany, and graduated from Federal Institute of Technology in Zurich as a Jewish physicist.

Einstein was born in a Jewish family in Ulm, Germany on 1879. 1900 graduated from the Federal Institute of Technology in Zurich and became a Swiss citizen. 1905 received a doctorate from the University of Zurich. Einstein put forward the photon hypothesis and successfully explained the photoelectric effect. So he won the Nobel Prize in physics at 192 1 and founded the special theory of relativity at 1905. General relativity was founded in 19 15. 1April 1955 18 died at the age of 76.

Einstein laid a theoretical foundation for the development of nuclear energy and initiated a new era of modern science and technology, and was recognized as the greatest physicist after Galileo and Newton. 199965438+On February 26th, Einstein was selected as "the great man of the century" by American Time magazine.

References:

Introduction to Einstein (Baidu Encyclopedia)