If you wave your hand under the water’s surface, you get a pattern of ripples on the surface shortly thereafter. Now imagine working that backwards: you want to produce particular ripples on the surface, so how do you wiggle around the water molecules underneath?
That’s the project that a crew from the University of Navarre in Spain undertook. Working backwards from the desired surface waves to the excitation underwater is “just” a matter of math and physics.
Liquid-Photo is a screensaver app for the PlayBook that gives a photo a ripple effect when touched. Imagine a picture being reflected in water and when you touch it, the waves ripple through the picture, distorting it. The app is re...
Researchers from Max Planck in Stuttgart have created an acoustic hologram capable of moving objects using nothing but sound.
Just as waves ripple across a pond when a tossed stone disturbs the water's surface, gravity waves ripple toward space from disturbances in the lower atmosphere.
A simple technique has been developed that produces holograms made of sound waves. These acoustic landscapes are used to manipulate microscale objects, and offer great potential in medical imaging and selective heating. See Letter p...