Xinhua Hu and colleagues at Fudan University in Shanghai, China, have come up with a way to create shield against water waves that, unlike Enoch and Guenneau’s set-up, could also double up as a ...

Electromagnetic interference can be a serious problem for electronic devices, so shielding is usually placed around components. Now, engineers at Drexel University have found that a 2D material called ...

THE method of studying the ionized regions of the upper atmosphere by emitting small pulses of electric waves and recording the echoes reflected from the ionosphere is now well-known and is in ...

DURHAM, N.C. -- Researchers at Duke University and Aalto University (Finland) have constructed a "meta-mirror" device capable of perfectly reflecting sound waves in any direction. The ...

Compared to general metal reflectors, the new product is capable of reflecting millimetre waves in a more targeted manner. As a result, there are fewer restrictions on installation, making it possible ...

Radio waves reflecting back to Earth from the ionosphere can offer valuable news about the extent of climate change. His simple, cost-effective measurement can be a valuable contribution to the ...

We saw earlier that when sound waves come from correlated sources then their pressure and associated velocity components simply add. This meant that the pressure amplitude could vary between zero and ...

Researchers have constructed a 'meta-mirror' device capable of perfectly reflecting sound waves in any direction. The proof-of-principle demonstration is analogous to looking directly into a mirror ...