Where did the ink go? Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Where did the ink go? Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Drop ink or ink into a bottle of water to make the solution a pale blue. Put a tablet of crushed activated charcoal there. Close the mouth with your finger and shake the mixture. She brightens up before her eyes.

Focus secret:

The fact is that coal absorbs dye molecules with its surface and it is no longer visible.

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The street is lit by the sun and the wind 07.01.2008

One of the French firms began producing street lamps powered by the sun and wind. A small vertical-axis windmill mounted on top of a lamppost produces up to 400 watts of power (depending on wind speed).

In addition, the lamp is equipped with a solar battery. Energy from these two sources is stored in batteries that are located inside the pole. With the onset of darkness, a flashlight is automatically turned on, consisting of 42 white LEDs, consuming a total of 60 watts. Their service life is one hundred thousand hours.

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