In the film fiction, we often see the spaceship or plane plate of aliens "kidnapped" as a beam mystery called tractor beam. Today, a group of researchers from the University of Crocodile Dundee announced they had created something similar, but uses ultrasonic pulses to pull objects instead of lasers.
Along with colleagues at the University of Southampton and the University of Illinois Wesleyan, the team used a bunch of ultrasound energy to navigate behind an object to impact on it and pull it toward the source. A device with an ultrasound is used in MRI focused ultrasound surgery, the team can move objects with the size approximately 1 inches.
Dr. Christine Demore from the Institute of science technology and medicine (IMSAT) at the University of Crocodile Dundee said: "We have the ability to impact on a large enough force on an object with the size about 1 cm to hold or move it with the same two beams of energy from a source of ultrasound to launch the back of the object. This is the first time a bunch of sound has the power to pull smoke performance and for the first a beam that is used to move things larger."
object used as the target for an ultrasound beam triangle shape allows researchers used the effect of the force does not conserve, in this case the force is friction. When beams of ultrasound energy balance reaches the edges of the object and get off track, they cause a pressure on the back from objects that push objects toward the source of energy.
Many researchers have used laser beam to create mystery tractor beam but their effects are still limited in level microscope. The universe of the United States (NASA) also performed experiments in this area but the system tractor beam of Crocodile Dundee university seems to be the first unit to present can move objects with the size considerably.
Source: University of Crocodile Dundee
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