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Light Can Generate Power Lift
Light Can Generate Power Lift
The scientists created a light foil that can push small objects to the side.
Light function to generate the same power that makes aircraft flying, as shown by a new study.
With proper design, uniform flow of light encouraging the objects are very small such as an airplane wing aircraft into the air to raise the body.
Researchers have long known that hitting an object with light can push the object. That's the thinking behind solar screens, which utilizes radiation for propulsion in space. "The ability of light to push something already known," said co-researcher Grover Swartzlander of the Rochester Institute of Technology in New York, told Science News (05/12/10).
New tricks of light more interesting than a regular boost: It creates a more complicated force called lift, evident when a flow in one direction to move an object vertically. Foil air or airfoil develops lift, when turning the propeller engine and move the plane forward, its wings are tilted causing the plane ride.
Foil light is not meant to keep an airplane in the air during a flight from one airport to another airport. But the unity of the tools are so small it may be used to power micro machines, transports the particles are very small or even allow steering methods on solar screens.
Optical lift force is "a very neat idea," says physicist Miles Padgett of the University of Glasgow in Scotland, but terlau early to say how these effects may be utilized. "It may be useful, maybe not. Time will tell."
Light can have an unexpected lift force was started from a very simple question, Swartzlander said, "If we have something shaped wing and we shine with the light, what happened?" Modeling experiments showed the researchers that an asymmetrical deflection of light will create a very stable lift force. "So we thought it best to do an experiment," said Swartzlander
The researchers made very small bars shaped like an airplane wing, on the one side and flat on the other side of the winding. When the foil-micron sized air foil is immersed into the water and hit with 130 milliwatts of light from the bottom of the container, foil-foil begins to move upward, as expected. But the bars are also starting to move sideways, perpendicular to the direction of the incoming light. Symmetrical balls are very small do not show the effect of the lift, as the team found.
Different optical lift force of lift aerodynamics with an air foil. An airplane flies because air flowing more slowly under his wings using more pressure than the air flowing faster over the top. But in light foil, lift is created inside these objects when the beam through it. Terebut transparent air foil shape causes the light is refracted differently depending on where the light was passed, which causes the bending beam within their momentum that generates lift.
The corners of the lift foil-foil light is about 60 degrees, according to the findings of the team. "Most aerodynamic bodies airing on the corners of a very gradual, but it does have the ability to lift angles were superb and very strong," Swartzlander said. "You can imagine what would happen if the plane you are on the air at 60 degrees - your stomach will be on foot."
When the bars were lifted, it should not fall down or lose its lift, as predicted. "Actually, things could stabilize themselves," said Padgett.
Swartzlander said that he hopes could eventually test the foil-foil light in the air, too, and try a variety of shapes and materials with different refractive properties. In the study the penelit uses infrared light to generate lift, but other types of light can, Swartzlander said. "The beautiful thing about this is that it will work as long as you have the light."
The study was published in Nature Photonics on December 5.
Hopefully this can be further investigated and developed for the good
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