Amazing fan. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Amazing fan. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

You have a fan in your hands. Open it completely and show it on both sides. Both of its sides are the same, dark, in addition, each of them has a light pattern. Just for a moment fold the fan and open it again - the sides of the fan have changed color! Both sides of the fan became completely light. Moreover, the drawing turned its color - from light to dark.

Focus secret:

Changing the colors of the fan is very simple. In figure a, it is easy to see that the fan on the left is turned in one direction, and the fan on the right is turned in the other. This is the secret of the color change, since the fan consists of planks painted in two colors (fig. b - both on one side and on the other).

Focus Amazing fan

The slats are interconnected by a thread, and the pitch of the thread (the distance between the individual slats) must be less than the half-width of the slat, since without this the fan will not have an even color coverage.

The most extreme strips during turns (shown by arrows in Fig. a) remain completely open, so their color can be left, for example, white. The same drawings of the corresponding colors are applied to the planks with the fan open.

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Innovative lidar Velodyne VLS-128 02.12.2017

Velodyne has unveiled an advanced lidar that is expected to take the capabilities of automotive self-driving systems to a whole new level.

Lidar is one of the key elements of the autopilot in its current form. This device uses a laser emitter to scan the surrounding space. Based on the information about the reflections of the rays, a three-dimensional map is compiled - with its help, the exact distances to certain objects around the car are calculated.

Until recently, Velodyne's most powerful lidar was the HDL-64 with 64 laser beams. In the new device with the designation VLS-128, the number of beams is doubled - up to 128. At the same time, the dimensions were reduced by 70%.

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