What is Big Think?  

We are Big Idea Hunters…

We live in a time of information abundance, which far too many of us see as information overload. With the sum total of human knowledge, past and present, at our fingertips, we’re faced with a crisis of attention: which ideas should we engage with, and why? Big Think is an evolving roadmap to the best thinking on the planet — the ideas that can help you think flexibly and act decisively in a multivariate world.

A word about Big Ideas and Themes — The architecture of Big Think

Big ideas are lenses for envisioning the future. Every article and video on bigthink.com and on our learning platforms is based on an emerging “big idea” that is significant, widely relevant, and actionable. We’re sifting the noise for the questions and insights that have the power to change all of our lives, for decades to come. For example, reverse-engineering is a big idea in that the concept is increasingly useful across multiple disciplines, from education to nanotechnology.

Themes are the seven broad umbrellas under which we organize the hundreds of big ideas that populate Big Think. They include New World Order, Earth and Beyond, 21st Century Living, Going Mental, Extreme Biology, Power and Influence, and Inventing the Future.

Big Think Features:

12,000+ Expert Videos

1

Browse videos featuring experts across a wide range of disciplines, from personal health to business leadership to neuroscience.

Watch videos

World Renowned Bloggers

2

Big Think’s contributors offer expert analysis of the big ideas behind the news.

Go to blogs

Big Think Edge

3

Big Think’s Edge learning platform for career mentorship and professional development provides engaging and actionable courses delivered by the people who are shaping our future.

Find out more
Close

New Type Of Invisibility Cloak Cancels Out Light Waves

March 28, 2013, 9:07 AM
Shutterstock_97336733

What's the Latest Development?

Scientists at the University of Texas-Austin have succeeded in creating a miniature cloak that can render objects invisible in microwave light. As described in a paper published in this week's New Journal of Physics, the cloak is made of a metascreen, which consists of very thin strips of copper tape attached to a similarly thin polycarbonate film. The flexibility of this material makes it more practical than bulkier versions used in other cloak designs. In tests, the team was able to hide a 7-inch cylindrical rod from view. 

What's the Big Idea?

Unlike other attempts at invisibility cloaks, which bent light rays around an object to prevent scattering or reflection, this cloak works by canceling out light rays that hit the shielded object. Physicist and paper co-author Andrea Alu says that theoretically this technique should work for hiding objects in visible light as well, since the metascreen material "[is] easier to realize at visible frequencies than bulk metamaterials and this concept could put us closer to a practical realization." The team also suggests it could be used with noninvasive sensors and other medical devices in the future.

Photo Credit: Shutterstock.com

Read it at LiveScience

 

New Type Of Invisibility Cl...

Newsletter: Share: