Moving liquid. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Moving liquid. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

In one hand you hold a tray with three glasses on it. In the middle glass - wine. In your other hand, you hold a handkerchief with a stick sewn into the top edge.

Cover the tray with a handkerchief, then put it aside. The wine moved to the last glass. Cover the tray with the handkerchief again and put the handkerchief aside. Wine - already in another extreme glass.

Focus secret:

We need three ordinary glasses and a tray - a Plexiglas plate. The secret is in the red-painted wood insert. A fishing line is attached to the middle of the insert.

Focus Moving liquid

You clamp the other end of the fishing line with a bead with your teeth. During the trick, when you cover the tray with glasses from the eyes of the audience with a handkerchief, make a movement down and to the side with the hand holding the tray. As a result, the insert will come out of one glass and go inside another.

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Atomic clock on quantum entanglement 17.12.2020

To date, atomic clocks are the most accurate timepieces on Earth. The best devices of this type will be only a second behind in 15 billion years. However, in the future, scientists may need even more accurate timepieces to conduct research and control spacecraft. Conventional atomic clocks have a limit to the accuracy of time measurement. It is limited by quantum fluctuations that interfere with tracking the vibrations of atoms.

Atomic clocks use lasers to measure the vibration frequency of atoms. The period of these oscillations is so stable that its measurement allows you to count time with incredible accuracy. For example, the cesium-133 atom vibrates exactly 9 times per second, and atomic clocks based on this element are used to calculate world time.

Now physicists have been able to make such chronometers even more accurate. To do this, scientists have collected a cloud of 350 cooled atoms of ytterbium-171, the oscillation frequency of which is even higher than that of cesium-133, and placed them in an optical cavity. Then a laser was directed at the resonator, which made it possible to create quantum entanglement between the atoms. This means that now these particles have become connected: when the state of one atom changes, the state of the one associated with it automatically changes.

Once the atoms were entangled, the scientists fired a second laser into the cloud. With it, the researchers illuminated it to measure the average vibration frequency of atoms. It turned out that quantum entanglement increases the accuracy of atomic clocks by four times. According to the results of the work, in 13,8 billion years, such devices will lag behind the reference time by less than 100 milliseconds.

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