On top of a skyscraper, and at its foot time flows differently

Scientists have proved that on our planet there are places where time flows faster.

Since in 1915 albert Einstein published the General theory of relativity, the principle, known as the gravitational red shift, have played an important role in physics. It refers to how time is speeding up and slowing down depending on the force of gravity – this means that a clock ticks faster in space than on Earth.

Time moves slower closer to a massive object that is a planet due to the growing gravitational potential. This is nothing new, but without an understanding of this phenomenon we will not be able to develop a satellite navigation system such as GPS.

Although the difference in time between man on Earth and a satellite in orbit has repeatedly been demonstrated, the researchers first measured the gravitational red shift from the observation deck of a skyscraper. The study, published in Nature Photonics, suggests that time runs at 4 NS (nanoseconds) per day faster on the 450-meter observation deck of Tokyo skyscraper than on the street. What time is accelerating at such a height, no wonder. This was calculated using a complex optical network, which often takes up the entire lab.

But the study’s author Hidetoshi Katori and his colleagues were able to fabricate a much smaller device – about the size of a regular refrigerator. He gets results, “comparable space experiments.” This unusual device is ready for use.