New technology brings `invisibility cloak` closer to reality
Washington: Researchers have developed a thin material to help make things "invisible" within a limited range of light waves.
If any object is wrapped in the material called "mantle cloak," and created by University of Texas in Austin researchers, it "disappears," but the effect only applies to a limited range of light waves - specifically microwaves, CNN reported.
In their experiment, the physicists covered a cylinder about a foot long and an inch or so in diameter with the material. Microwave detectors could no longer "see" it, although it was still visible to the human eye. But the researchers said that the same principle can be transferred to the range of perceptible light.
Doing so they said would then make objects invisible to the human eye.
The effect of the material only covers a very small band of electromagnetic waves at one time, and in the visible range of light, it will only work on objects much thinner than a single strand of hair.
According to the report, the new cloak is made by combining copper tape with polycarbonate, a material commonly used in DVD`s and CDs.
The cloak has a miniscule pattern - like a finely checkered shirt - that neutralizes the waves bouncing off of it.
For it to work, the material`s pattern has to be roughly the same size of the wavelength of light to be cancelled out, which gives it a tightly limited range of waves it will work on.
The material has no effect on a vast array of electromagnetic waves that come in a myriad of sizes.
The study has been published in the New Journal of Physics.
More from India
More from World
More from Sports
More from Entertaiment
- Afzal Guru row: JNU Students' Union president Kanhaiya Kumar arrested
- DNA: Analysis on actions taken against students protesting at JNU
- DNA: Analysis on actions taken against students protesting at JNU - Part II
- Watch: How students at JNU showcased anti-India spirit! - Part II
- DNA: Gravitational waves detected, proving Einstein right!
- Why Modi never spoke on issues like beef or Muzaffarnagar, asks Manmohan Singh
- 4th ODI: South Africa vs England - Hosts win game by solitary wicket to level series
- JNUSU prez Kanhaiya Kumar sent to 3-day police custody over Afzal Guru row, says being targeted for defeating ABVP in polls
- Ex-Army officers threaten to return JNU degrees against 'anti-national' activities in campus
- Delhi Police issues alert over alleged Hafiz Saeed's tweet backing 'pro-Pak' JNU protesters