Miguel A. Lema Mathematician at Northwestern University has uploaded a document to the server arXiv preprint, in which he describes the event invisibility device that does not require the use of metamaterial designs. In his design, the incident is an invisible mirror.
The event stealth device, also known as the time cloak or invisibility cloak concealment time, is a mechanism that causes an observer to appear and is an event that occurred during the passage of time, but none was observed. Based on this idea is to slow down first, then speed it up again. Doing so will result in the inability to observe lags or gaps in the event. Researchers have established that such devices use ultra-light materials that can speed up or slow down. But these devices have proved to be complicated and expensive. In contrast, in Lylemar's introduction of this new method, the speed of light can be manipulated with mirrors by making a long or short distance before the object is struck.
It involves the use of multiple mirrors, half of which can be manipulated on demand to allow light to pass through, or reflect the basic idea. The mirror is arranged in such a way that the light is first passed through to send it to another mirror instead of directly to an object and then reflected to the object's "slow". Subsequently, light is routed directly to the source, effectively speeding it up again. This will create a "lag" when one of the observers will appear. If the object is a regular wall clock, for example, the watcher may see a clock transition from 12:05 to 12:07, if lagging for two minutes. The duration of the lag depends on the distance from the light source mirror, so that the lag, minute, hour, or day may be due to placing the mirror on a distant planet or spacecraft.
Lerma actually created an invisibility device for an incident, but now he has found a way to do it cheaply, and it is likely that others will soon begin to develop such devices and methods to use it. At this time, it is not very clear that this device can be used to deceive people, as jewelry thief's device will be directly visible only invisible objects.
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