Invisible Electric Wires: Guiding Electricity with Sound

Scientists have discovered a novel method for guiding electric sparks using ultrasonic waves, a breakthrough published in Science Advances. Unlike previous methods relying on dangerous lasers, this approach utilizes ultrasound, making it safe, affordable, and easily operable. Ultrasound guides the sparks by manipulating air density, allowing them to navigate obstacles and even target specific spots on non-conductive materials. Potential applications span atmospheric science, biological procedures, selective circuit powering, and even a contactless Braille system.