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Rope tied with a scarf. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

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Focus Description:

Pass the rope to the viewer and offer to hold it in a taut position by the ends vertically. Take a scarf and tie it around the rope with two knots. Then take the rope from the spectator and tie its ends together.

The scarf and rope will be tied together with three knots. Give the ends of the tied rope to the viewer, and you yourself hold the ends of the scarf. At the same time as the viewer, stretch the ends of the scarf and rope in different directions. As a result, the viewer will be left with a tied rope, and you will have a scarf.

Focus secret:

The secret of the trick is tying the scarf. Tie the first knot around the rope with a fictitious one, which can be untied if you pull the scarf by the ends. Pull the ends of the scarf apart so that the left end is on the left and the right end is on the right. Draw the right end of the scarf around the rope.

Focus Rope tied with a scarf

If you now tie another knot, the scarf will not wrap around the rope. Tighten the second knot. Take the rope from a spectator and make a simple knot. Return the ends of the rope to the spectator, and take the ends of the scarf yourself.

By pulling the rope and the handkerchief in different directions with the viewer, you will get the result: the fictitious knot on the handkerchief will be untied, and you will have a handkerchief with one knot in your hands, and the viewer will have a tied rope.

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A research team from the University of Central Florida has demonstrated a technology that produces record-breaking short X-ray pulses of 53 attoseconds. The group, led by Professor Zenghu Chang, broke their own record set back in 2012, which at the time was 67 attoseconds.

An attosecond is equal to 10^-18 seconds, or one billionth of one billionth of a second. And in 53 attoseconds, light has time to travel a distance equal to a thousandth of the thickness of a human hair. Just as fast-moving events can be recorded with ultra-high-speed cameras, such as the impact of a flying bullet on a target, attosecond pulses of light can record even faster events, such as the movement and interaction of electrons in atoms or molecules.

In addition to the fact that Professor Chang's group managed to obtain record-breaking short X-ray pulses, these pulses had a shorter wavelength than previously obtained. The frequency of light pulses is in the spectral region of the so-called "water window" (water window), a wavelength that is actively absorbed by carbon atoms and is absolutely transparent to water.

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