I saw this invisibility cloak once. It was made of 10 fiberglass rings covered in copper. It bends microwaves around objects like a river bends around a rock. Makes things invisible to radar, not eyes. Unless your eyes can see microwaves. Mine can’t. I checked. They say it opens a new chapter in electromagnetism. I didn’t know electromagnetism had chapters. Must be a long book. The metamaterial cloak only works for microwaves now. To hide from visible light, they’d need really tiny structures. Like, nano-tiny. Scientists are still figuring that out. Maybe in 5 or 10 years. I’ll mark my calendar. A professor said you could wrap it around a fighter plane or tank. But it’s not like Harry Potter’s cloak. It’s more like a shed. I always wanted an invisible shed. They might use it to hide things from terahertz waves or cell phone signals. I tried to hide from my cell phone once. It kept finding me.
Fact Check
1. The cloak described consists of 10 fiberglass rings covered with copper elements and is classified as a “metamaterial”[1][2].
2. The metamaterial cloak channels microwaves around objects, similar to how water flows around a rock in a river[1][2].
3. Professor John Pendry from Imperial College London was involved in the research and commented on the potential of metamaterials[1][3].
4. Creating a cloak for visible light would require much smaller metamaterial structures, which are not yet feasible with current technology[3][5].
5. The cloak could potentially be used to hide objects from radar, terahertz waves, or even mobile phone frequencies[2][4].
These facts are corroborated by the search results, which discuss various aspects of metamaterial cloaking, including its principles, applications, and current limitations.
Read More
[1] https://www.nature.com/articles/srep33624
[2] https://www.nature.com/articles/ncomms2219
[3] https://journals.aps.org/prx/abstract/10.1103/PhysRevX.3.041011
[4] https://en.wikipedia.org/wiki/Metamaterial_cloaking
[5] https://stories.duke.edu/beyond-materials-from-invisibility-cloaks-to-satellite-communications
[6] https://www.sciencedirect.com/science/article/pii/S1369702109700720
[7] https://now.northropgrumman.com/engineered-metamaterials-make-invisibility-cloaks-and-more
[8] https://www.researchgate.net/publication/37469450_Electromagnetic_Cloaking_With_Metamaterials