Disappearing ball. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Disappearing ball. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

The magician rolls up a bag of paper and lowers a large rubber ball into it. After that, he crushes the bag. The ball disappeared without a trace!

Focus secret:

A large rubber ball has a small hole. It is not visible from the other side.

When you crush the bag along with the ball, it loses its shape and the ball seems to disappear. The paper must be removed without unfolding.

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Random news from the Archive

Updated NFC specification 17.05.2020

The NFC Forum has announced a short-range wireless technology update that adds wireless charging to the standard. Thus, future NFC devices will be able to offer wireless charging functionality. Although their capabilities will be more limited compared to the popular Qi standard used on almost all other devices.

The new NFC standard delivers significantly less wireless power of just 1W compared to Qi's baseline power of 5W. (Qi fast charging can reach 10W or more on standard hardware.) And it will require the use of new hardware components. Therefore, it will not be possible to add wireless charging to existing NFC-enabled devices with a simple firmware update.

Given the power limitation, the new standard is not positioned as a replacement for Qi wireless charging in energy-intensive smartphones, but rather is designed to complement it. Unlike the Qi standard, which requires physically large coils to transfer power between devices, the new specification for the WLC wireless charging standard for NFC allows a single antenna to be used for both data transmission and charging. The idea is that small devices such as headphones, fitness trackers or smartwatches can use the new NFC-based standard to charge on the go. In this case, smartphones equipped with an NFC module in a similar way can act as chargers.

The WLC standard has just now been added to the NFC specification, so it will take some time before equipment manufacturers start using it in their products.

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