What inventions did Einstein have?

It is no exaggeration to say that inventions derived from Einstein's scientific theory have covered almost every corner of modern civilization. Computer games, buses, digital cameras ... every detail of our daily life flashes Einstein's shadow.

smoke detector

Here is a hypothetical "you" as a metaphor. Please pay attention to the smoke detector on your head when you get up from the hotel in the morning and go out to prepare for morning exercise. It uses the radioactive substance americium -24 1 to release energy and produce a small charged particle belt. In the event of an accident, the smoke generated by the flame will react with the particle beam, triggering an alarm to sound automatically.

Because the nucleus of americium is unstable, once it is broken, its mass seems to disappear, because the mass of fragments is smaller than that of pronucleus. In fact, the mass of americium atom has not disappeared at all. This is what Einstein told us.

smooth road

When I get home, I have to drive to work, and the smooth road under the wheels is also engraved with Einstein's credit. In Einstein's doctoral thesis, new methods for measuring molecules in different solutions were discussed, which later became the basic methods of colloid chemistry. When building a expressway, a building materials engineer used his research results.

Electronic computer display

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.

Precision laser

Going to the supermarket after work, every bar code in my hand also benefits from Einstein's laser theory. Only the laser can accurately read the code in the bar code.

solar cell

If you want to use solar cells to provide energy for your room. These photovoltaic cells can convert solar energy into electric energy, and Einstein correctly analyzed this conversion principle for the first time in a paper published 90 years ago.

He found that photons have energy. Some photons carry enough energy to overcome the "stickiness" of electrons concentrated on a certain metal, which is the famous photoelectric effect.

digital camera

On Sunday, you will have a relaxing trip with your family. When you turn on the digital camera to take a picture of your family's warm smile, you should thank Einstein first. Photons flying in from the lens will crowd out the electrons in the semiconductor, which also takes advantage of the precious photoelectric effect.

medical science

If you have a minor illness, you need medication. Many drugs are made by Einstein's paper on Brownian motion.

Robert brown, a British botanist, was the first to observe that particles in suspended liquid always keep irregular motion. On the other hand, Einstein used Brownian motion to create a statistical method to link microscopic quantities with macroscopic quantities.

Until today, these statistical methods are still the matching rules that pharmacists all over the world must follow.

global positioning system (GPS)

It doesn't matter if you win the lottery and get carried away and become the protagonist of Looking for You. Carrying a GPS (Global Positioning System) with you can help you get in touch with searchers. 100 years ago, Einstein found that the traditional concept of time was not sufficient if we wanted to consider multiple events in different places together.

Although the GPS satellite is equipped with an accurate atomic clock, if there is no time adjustment of the satellite atomic clock by the ground atomic clock, the signal sent by the positioning system to the ground every day will have a deviation of 1.6 km.

Control the energy of x-rays

You have a tumor, which is benign, but you need radiotherapy after the operation because it grows on the thymus. Doctors need to estimate the damage that X-rays may cause to your cells according to Einstein's E=mc2 before giving you radiotherapy.

This is also an important discovery made by Einstein 100 years ago: any mass can be regarded as compressed energy. To know how much energy a certain mass can produce, you can multiply the lost mass by the square of the speed of light-that's absolutely astronomical! According to this theory, while making an atomic bomb and a hydrogen bomb, you also cured your thymoma.

Without Einstein,

Without Einstein, when would his theory (especially the theory of relativity) come out? For such a hypothesis, different people must have different opinions. Sir Martin Reyes, a famous astrophysicist, believes that without Einstein, it would undoubtedly fall behind the pace of modern civilization.

E=mc is the theory of relativity.