The study, by researchers from Imperial College London, involves a new class of materials called metamaterials, which can be artificially engineered to distort light or sound waves. With conventional materials, light typically travels along a straight line, but with metamaterials, scientists can exploit a wealth of additional flexibility to create undetectable blind spots. By deflecting certain parts of the electromagnetic spectrum, an image can be altered or made to look like it has disappeared.
Previously, a team led by Professor Sir John Pendry at Imperial College London showed that metamaterials could be used to make an optical invisibility cloak. Now, a team led by Professor Martin McCall has mathematically extended the idea of a cloak that conceals objects to one that conceals events.
“Light normally slows down as it enters a material, but it is theoretically possible to manipulate the light rays so that some parts speed up and others slow down,” says McCall, from the Department of Physics at Imperial College London. When light is ‘opened up’ in this way, rather than being curved in space, the leading half of the light speeds up and arrives before an event, whilst the trailing half is made to lag behind and arrives too late. The result is that for a brief period the event is not illuminated, and escapes detection. Once the concealed passage has been used, the cloak can then be ‘closed’ seamlessly. Continue reading …
- Don’t laugh, but the US has charged 5 Chinese military hackers with cyber espionage
- What the heck is Fog Computing?
- Mozilla is phasing out SHA-1 based signature algorithms
- Two things I’ve learned from using Tor Browser
- Social Engineering infographic: Phishing and vishing
- Don’t like the Mozilla/Yahoo deal? Make StartPage your search engine
- How to create MBR-based disk partitions for Antergos
- Dual-boot Windows 7 and Antergos on a PC with 2 HDDs and UEFI firmware
Digital Ocean is a VPS/Cloud hosting provider. For just $5 per month, you can get yourself a Cloud server with 512 MB of RAM, 20 GB super-fast SSD, free snapshots, plus backups for a minimal fee. All via a simple graphical interface.
And by signing up with this referral link, you can help support this website.
If you are reading this, your ad could also be occupying this space. Contact us to make it happen.
Subscribe by Email
Sign up to automatically receive the latest articles and tutorials in your Inbox.
Reach out & follow us
- TwitterFollow us on Twitter
- Google PlusJoin a prestigious circle
- RSS FeedSubscribe to our RSS Feed
- EmailReach out to us via email
- PC-BSD 10.1.1 Cinnamon review 6 comments
- How to configure Ubuntu 14.04 server to forward root mails to your email address 5 comments
- For an editor, Atom uses way too much RAM 4 comments
- How to delete Superfish from Lenovo computers permanently 3 comments
- Two things I've learned from using Tor Browser 2 comments
- Raspberry Pi 2 vs Creator 120 1 comments
- Carl: I have a Lenova laptop. I bought it specifically to install …
- lalebarde: Fully agree. That's 13 years I have had used Linux as my mai…
- jpmcbooks: The latest 9.3 version of FreeNas requires a 64 bit compute…
- finid: What Linux distribution did you install. Is the PC using UEF…
- venky: sorry for previous comment. i am find 2 page and solve the a…