In 1971, the Russian physicist Yakov Zel’dovich predicted that electromagnetic waves scattered by a rotating metallic cylinder should be amplified by gaining mechanical rotational energy from the ...

The latter discovered in 1971 that a rotating object could amplify electromagnetic waves under certain conditions, an effect now known as the Zel'dovich effect. To reproduce this effect ...

The setup created the special conditions where the cylinder’s rotation could amplify electromagnetic waves. They didn’t stop there. By adding a resonant circuit—a kind of electromagnetic ...

"The condition for amplification is from the rotating perspective of the object," explains Marion Cromb. "Twisting electromagnetic fields hitting it have become rotationally Doppler shifted ...

Any rotating, axially symmetrical body that absorbs electromagnetic radiation—such as a metal cylinder—can also exhibit superradiance under certain circumstances. “Roughly speaking ...

Toroidal pulses Air cannons produce visible vortex rings by generating rotating air pressure differences, while electromagnetic cannons emit electromagnetic vortex pulses using coaxial horn antennas. ...

Air cannons produce visible vortex rings by generating rotating air pressure differences, while electromagnetic cannons emit electromagnetic vortex pulses using coaxial horn antennas. The ...