Atomic clock
Einstein put forward 1907 " fictitious elevator " the experiment is proved to be correct. That is to say, is A Erbai special? The gravitation theory of Einstein gets confirming again, reached new definition. The equation of broad sense the theory of relativity is forecasted local inertial difference is each object 0, american state level and technical institute (NIST) physicist has been calculated gave record-breaking, the dinky kill that makes a person fab, basically be close to Yu Ling. So, what did they measure?
That is circled in the earth namely when the sun moves, the exceeds accurate and atomic clock between divergence that the place differs on the earth.
Elevator thought experimentThe place of the talent of Einstein depends on him partly capable to ponder over physics problem only through imagination. These are so called " thought experiment " in conception broad sense relativistic academic side produced a lot of deep opinion, broad sense the theory of relativity is the theory that describes gravitational force.
Elevator thought experiment
In the thought experiment of Einstein, a the famousest case is the example about fictitious elevator. According to the tentative idea of Einstein, the person inside elevator will not distinguish gravitation field and acceleration, because the person feels normally,the comes from the earth be down gravity that get is experienced very easily fall for the circumstance in 0 gravity, elevator is holding a person " up " quickly. If a person is tired in elevator, without the window, cannot differentiate an among them difference.
The group of NIST checked another aspect of this thought experiment, namely all things in elevator can have identical acceleration, their opposite attribute also can keep changeless -- 0 change. This is one calls local seat fixity (LPI) concept. The scientist uses earthly itself to regard as " elevator " , compared the movement of on the earth ten atomic clocks. After the data that studied nearly 15 years, the poor value that gets as a result is 2.2E-7 ± 2.5E-7, be close to Yu Ling very much.
Be just as minute of second to be not differredPhysicist expresses, the result that before this result is compared, gets is close to Yu Ling more, this should be attributed to technical progress, especially the accuracy with current and atomic breathtaking clock. These atomic clocks are extremely stable, they are in 14 billion years (at present cosmic age) the error in time does not exceed 1000 seconds.
Broad sense the theory of relativity
Nevertheless, still the problem depends on a scientist needing to make the result is close to theory more as far as possible now. Accordingly, new atomic clock has been in research, and should be met offer in a few years of future more careful measure.
Since present result is already such,be close to Yu Ling, why be measured even again?
Because local seat fixity should be cosmic major attribute, fixity of buy of place of play a game of chess has more accurate measure, mean other all physical numbers can become more accurate. Anyhow, again, the thought experiment of Einstein is proved to be correct again.
Current, this research has been published in as a result " natural physics " (Nature Physics) on the magazine.
